Graded readers or original books?
Graded readers, if an original book gives you more than five or six unknown words a page. Move to originals once the top level of a series feels easy.
What are graded readers?
Graded readers are books written or adapted for language learners, with the plot, vocabulary and grammar controlled level by level. The Extensive Reading Foundation also calls them language learner literature. Each level allows a fixed number of headwords, the base words a writer may use, so a reader at that level meets few words outside the list. There is fiction and non-fiction, and many of the novels are retellings of classics.
Two of the best-known English series, with the publishers’ own headword counts and CEFR levels:
| Oxford Bookworms | Headwords | CEFR | Average words | Penguin Readers | Headwords | CEFR | Story length |
|---|---|---|---|---|---|---|---|
| Starter | 250 | A1 | 1,375 | Starter | 350 | Pre-A1 | 400–600 |
| Stage 1 | 400 | A1–A2 | 5,200 | Level 1 | 550 | A1 | 1,000–1,600 |
| Stage 2 | 700 | A2–B1 | 6,500 | Level 2 | 700 | A1+ | 3,000–5,000 |
| Stage 3 | 1,000 | B1 | 10,000 | Level 3 | 1,000 | A2 | 7,000–10,000 |
| Stage 4 | 1,400 | B1–B2 | 16,000 | Level 4 | 1,200 | A2+ | 11,000–14,000 |
| Stage 5 | 1,800 | B2 | 23,000 | Level 5 | 1,600 | B1 | 15,000–18,000 |
| Stage 6 | 2,500 | B2–C1 | 30,000 | Level 6 | 2,000 | B1+ | 18,000–22,000 |
| Level 7 | 2,500 | B2 | 22,000–26,000 |
Two cautions. Headwords are not the same as the words you know: one headword covers several forms, and publishers count them differently. And the CEFR labels are the publishers’ own; the same headword count sits at B1 in one series and A2 in the other. Compare the headword numbers, not the level names. The Extensive Reading Foundation says the same and publishes its own scale based on headwords only.
Cambridge English Readers and Macmillan Readers are set beside these two, level by level, on How do graded reader levels match CEFR? Learning Spanish? The levels publishers give to Olly Richards’ stories, Paco Ardit’s novels and the Lola Lago series are compared on Which Spanish graded readers are really A1, A2 and B1?
The reason graded readers work is simple arithmetic. Paul Nation counted the words in an Oxford Bookworms retelling of The Picture of Dorian Gray at 1,000 headwords: a reader who knows the 3,000 most frequent English word families, plus the characters’ names, knows 98.86% of its words. For an ordinary novel, 98% takes 8,000 to 9,000 word families.
Graded readers and originals side by side
| Graded readers | Original books | |
|---|---|---|
| Vocabulary | Limited to a fixed list for each level, so the share of known words stays high | Whatever the author needed; the share of unknown words depends on the book, not on you |
| Grammar | Controlled by level: simple tenses first, complex sentences later | Everything at once |
| Length | Short at low levels, longer at high levels | Anything from a short story to a thousand pages |
| Repetition | The same words come back often, which helps you learn them | Rare words may appear once and never again |
| Choice | A wide range in English, far fewer titles in most other languages; many are retold classics | Everything ever written |
| Language | Simplified, sometimes flat; retellings lose the author’s style | Real, with the author’s voice, humour and culture |
| Cost | Mostly paid; libraries and schools often have sets | Public-domain classics are free; modern books are paid |
Free graded readers do exist, mostly in English and mostly online: we keep a list of where to find free graded readers, by language and level.
Are graded readers worth it?
For most learners who cannot yet read original books comfortably, yes. Their value is volume: they let you read a lot of text you understand, and research on reading a lot of easy text finds steady, moderate gains. They teach little from any single book, so the benefit comes from reading many of them.
Reading a lot helps, moderately. Two meta-analyses pooled dozens of studies of extensive reading, where learners read many easy books of their own choice. Takayuki Nakanishi (2015) combined 34 studies and found a medium effect on reading proficiency compared with learners who did not read extensively. Eun-Young Jeon and Richard Day (2016) combined 49 studies and found a similar effect, larger for adults than for children and teenagers. A 2025 review reached the same conclusion across comprehension, vocabulary, fluency and motivation: consistent, small to medium gains.
One book teaches few words for good. Rob Waring and Misako Takaki (2003) had 15 learners read a 400-headword graded reader containing 25 invented words. Right after reading, the learners could translate on average 4.6 of the 25; three months later, 0.9. After three months, none of the words met fewer than eight times was remembered.
Words that come back are learned. Ana Pellicer-Sánchez and Norbert Schmitt (2010) had 20 advanced learners read an unabridged novel, Things Fall Apart, which uses Igbo words new to every reader. Words met more than ten times were recognised 84% of the time; words met once, 29%. Other studies agree that about ten encounters produce solid gains, though full knowledge of a word takes more.
Put together: the benefit comes from volume, and volume is only possible in books you can read without constant stopping. That is the case for graded readers, and also the case for any original book that passes the one-page test.
Are graded readers useful at B2 and above?
Less than before, but often still yes. The top levels of the big English series end around B2: Oxford Bookworms Stage 5 is B2 and Stage 6 is B2–C1, both by the publisher’s labels, and Penguin Readers Level 7 is B2. Original novels are a long way further up. On the X_Lex test, learners at B2 typically know 3,250 to 3,750 of the 5,000 most frequent English words, while an ordinary novel needs 8,000 to 9,000 word families for 98% of its words to be known. The two measures are not the same, but the gap is large enough that many originals stay hard at B2. The figures are explained on Is this book right for my level?
At this stage graded readers are most useful for fast, easy reading alongside harder books, and as a bridge. Paul Nation’s free Mid-frequency Readers, for example, rewrite classics at 4,000, 6,000 and 8,000 words, above the range of ordinary graded readers: see where to find free graded readers. At C1 the Council of Europe describes most kinds of literary text as readable with occasional help, and graded readers have little left to offer.
Between the two
The jump from graded readers to originals does not have to be one step. Some books sit in between:
- Short originals. Novellas and short stories let you finish something real in an evening or two. In our table, Die Verwandlung, Candide, Le Horla and The Strange Case of Dr. Jekyll and Mr. Hyde are all under 45,000 words.
- Books for children and teenagers. Written for native readers, but with shorter sentences and more familiar topics. The catch: children’s books are not always easy for adults learning the language, because they use informal and playful words that courses don’t teach.
- Books you already know. A novel you have read in your own language, or seen as a film, is easier in the new language because you can follow the plot when the words run out.
- Parallel and learner editions. The original with a translation on the facing page, or with notes and a glossary. Useful as a bridge, as long as you read the original side and not the translation.
When should I move to original books?
Move on when graded readers at the top of a series feel easy and an original book at your level passes a simple page test. Three signs:
- You are reading graded readers at the two highest levels of a series and rarely stop for words.
- An original book at your level passes the one-page test: five or six unknown words per page or fewer.
- You notice you want to know what happens next more than you want to finish the chapter. That is the sign the reading is working, whatever kind of book it is.
Switching does not have to be final. Many learners read an original book slowly and a graded reader quickly at the same time: one for challenge, one for volume.
Sources
- Extensive Reading Foundation (2011). The Extensive Reading Foundation’s Guide to Extensive Reading. erfoundation.org/guide/ERF_Guide.pdf
- Extensive Reading Foundation. ERF Graded Reader Scale. erfoundation.org
- Oxford University Press. Oxford Bookworms Library: levels and word counts, checked 28 September 2026. oup.es, oupjapan.co.jp
- Penguin Random House (2019). Penguin Readers Handbook. penguinreaders.co.uk
- Nation, I. S. P. (2006). How large a vocabulary is needed for reading and listening? The Canadian Modern Language Review, 63(1), 59–82. doi.org/10.3138/cmlr.63.1.59
- Nakanishi, T. (2015). A meta-analysis of extensive reading research. TESOL Quarterly, 49(1), 6–37. doi.org/10.1002/tesq.157
- Jeon, E.-Y. and Day, R. R. (2016). The effectiveness of ER on reading proficiency: A meta-analysis. Reading in a Foreign Language, 28(2), 246–265. Full text (ERIC)
- Sangers, N., van der Sande, L., Welie, C., Dobber, M. and van Steensel, R. (2025). Learning a language through reading: A meta-analysis of studies on the effects of extensive reading on second and foreign language learning. Educational Psychology Review, 37(4), article 96. doi.org/10.1007/s10648-025-10068-6
- Waring, R. and Takaki, M. (2003). At what rate do learners learn and retain new vocabulary from reading a graded reader? Reading in a Foreign Language, 15(2), 130–163. doi.org/10.64152/10125/66776
- Pellicer-Sánchez, A. and Schmitt, N. (2010). Incidental vocabulary acquisition from an authentic novel: Do Things Fall Apart? Reading in a Foreign Language, 22(1), 31–55. Full text (ERIC)
- Webb, S. (2007). The effects of repetition on vocabulary knowledge. Applied Linguistics, 28(1), 46–65. doi.org/10.1093/applin/aml048
Next: Reading with a dictionary.