This table is (and will always be) a work in progress and gives approximate levels for each graded reader series by most of the major publishers. Sorry it's so big! For details of the scale itself click here. I listed here only books written specifically for foreign and second language learners, not materials written for first language reading.

The books are positioned based on headwords primarily, and in the absence of such, readability factors and 'best guesses.'  The comparison table shows how the scale compares to other major EFL proficiency scales.

Publishers should contact me if they wish their series to be added or amended in some way.

Latest update Jan 5 2019.  I plan to do a major update every year or so.  Let me know if I missed something

Here is a PDF file of some of this dated Feb 2016

Teen and Adult series

		Beg.					Elem			Int.			Upper Int.			Advanced			Bridge		Near Native
		Alphabet	Early	Mid	High	Early	Mid	High	Early	Mid	High	Early	Mid	High	Early	Mid	High	Early	Mid	High
	Headword level	1-50	51-100	101-200	201-300	301-400	401-600	601-800	801-1000	1001-1250	1251-1500	1501-1800	1801-2100	2101-2400	2401-3000	3001-3600	3601-4500+	4501-6000	6001-8000	8001-12000	12001-18000
Abax										1200
AAS Press	Awesome Adventure Readers				1  2  3
Burlington Books	ESO Readers					1	2		3		4
Burlington Books	Bachillerato Readers											1		2
Cideb's Black Cats	Early Reads		1	2 3	4 5
Cideb's Black Cats	Easyreads				1	2
Cideb's Black Cats	Green Apple					Starter		Step 1		Step 2
Cideb's Black Cats	Reading and Training							Step 1		Step 2-B1.1		Step 3-B1.2		Step 4-B2.1	Step 5-B2.2	Step 6-C1
Cideb's Black Cats	Reading and Training Discovery							Step 1		Step 2-B1.1		Step 3-B1.2		Step 4-B2.1	Step 5-B2.2	Step 6-C1
Cideb's Black Cats	Reading and Training Professional							Step 1-A2		Step 2-B1.1		Step 3-B1.2
Cideb's Black Cats	Reading Classics															C1	C2
Cideb's Black Cats	Interact with literature														B2	C1
Cambridge University Press	Cambridge English readers				Starters	1		2			3		4		5		6
Cambridge University Press	Discovery readers				Starter	Beg./Elem		Elem/Low Int	Low Int	Int			Upper int
Compass Publishing	Classic readers						1	2	3	4	5	6
Collins ELT	English Readers													Readers
Collins ELT	Amazing People							1-A2	2- A2-B1	3- B1		4 - B2
Collins ELT	Agathe Christie Readers							1-A2	2- A2-B1	3- B1		4 - B2
Egmont Easyreaders	Teen readers					1		2		3		4
Egmont Easy Readers	Read On					1		2
Egmont Easyreaders	Easy Readers							A		B		C			D
ELI Readers	Classics												B1/B2
ELI Readers	White							A1/A2
ELI Readers	Ready to Read					Beg/ Elem
ELI Readers	Teen beat							Elem		Lower Int.		Int.
ELI Readers	Young Adult						1	2	3			4			5
ELI Readers	Young ELI Readers		1	2	3	4
Express Publishing readers	Illustrated readers					1-A1		2-A			B1
Express Publishing readers	ELT Graded readers							1-A2		2-B1
Express Publishing readers	Classic readers							A2		B1		B2		C1
Express Publishing readers	ELT Showtime					A1		A2		B1
Foxton Readers					Starter	1	2		3		4	5	7
Garnet Education	Oracle readers					Level 1		Level 2	Level 3	Level 4	Level 5
International Language Teaching Services (Heuber)	Classic readers												Classic readers
International Language Teaching Services (Heuber)	Robin readers					1	2	3	4		5			6
Helbling	Classics					1	2		3		4	5
Helbling	Fiction Graphic Stories					1	2		3
Helbling	Fiction Short reads					1	2		3
Helbling	Fiction										4	5
Helbling	Young Readers			??	??	??
Heinle Cengage	Footprint Reading Library							800-A2	1000-A2		1300-B1	1600-B1	1900-B2	2200-B2	2600-C1 3000-C1
Heinle Cengage	Foundations Reading Library		1  2	3   4	5	6    7
Heinle Cengage	Page Turners Reading Library			1	2	3	4	5	6	7	8	9	10	11	Level12
Heinle Cengage	Heinle Reading Library						A			B		C
Heinle Cengage	Classic Comics											B1	B2
Heinle Cengage	Collections						A				B		C
Hueber Lekt�ren					1		2	3		level 4	5	6
Macmillan	Macmillan readers				Starter-A1		Beg.-A1			Elem-A2	Pre-Int-A2/B1	Int-B1		Upper Int-B2
Macmillan Language House	Read Smart Readers									1	2	3	4	5>
Marshall Cavendish (owned by Heinle Cengage)	Summertown readers										Pre-Int B1		Int B2			Adv C1
Marshall Cavendish	Fast Track Classics										Pre-Int B1		Int B2
MM Publications	Primary readers				Levels 1, 2, 3, 4	5  6
MM Publications	Top readers					A1		A2.1	A2.2		B1			B2
MM Publications	Classic stories					A1		A2.1			B1			B2
MM Publications	Original stories					A1		A2.1			B1
MPI	Building Blocks Library		1  2	3   4	5	6  7	8	9
Oxford University Press	Bookworms Library				Starter	1		2	3		4	5			Stage 6-B2/C1
Oxford University Press	Dominoes				Starter	1		2	3
Oxford University Press	Factfiles (in Bookworms Library)					1		2	3		4	5
Oxford University Press	Graded readers (defunct?)						500	750
Oxford University Press	Oxford Bookworms Collection												Series
Oxford University Press	English Today readers
Oxford University Press	Oxford Bookworms Club															C1	C2
Oxford University Press	Playscripts					1		2
Oxford University Press	Progressive English readers								Starter		1		2			3	Grade 4    Grade 5
Oxford University Press	Storylines
Penguin readers	Penguin readers			Easystarts	1		2			3		4		5	6
Penguin readers	Penguin Active reading			Easystarts	1		2			3		4
R.I.C Publications	Fast Fiction						Fast fiction
R.I.C Publications	ELT Readers (Scholastic titles) see below
R.I.C Publications						Elem			Pre-int
Richmond readers	Readers			Young Starter		Starter	1	2		3		4	Adv.
Richmond readers	Media readers
Richmond readers	World facts
Scholastic ELT	ELT readers (Mary Glasgow)				Starters		1		2		3
Seed Learning	World History Readers							1	2	3	4		5		6
Usborne	Usborne English Readers
Witman readers
World Wide readers								1		2			3
Yohan (Now IBC)	Ladders								1	2		3	4		5

The following series below are not rated in the same way as above except that they do roughly correspond, so I put them in anyway. Note that these lists below are far less complete and accurate than the ones above.

EFL / ESL Children's Series

Other series

Languages other than English (NB This is how they are advertised and does not necessarily mean they are for reading fluency. Caveat emptor.

Thanks to Tom Robb for many of the non-English ones.