Books for beginner readers aged 3-8 (Foundation and KS1)
DR11 

16 different books, 4 at each stage, introducing sounds of the alphabet.

Unit 4: d, e, f, v,
Unit 5: k, l, r, u,
Unit 6: j, w, z,
Unit 7: x, y, ff, ll, ss, zz

The first unit of books has words using the sounds s, a, t, i and m.

Books in the following units use these sounds and gradually introduce new ones. By the end of Unit 7, all the initial sounds of the alphabet will have been introduced. 

Units 8 to 10 encourage the reader to read words with four or five sounds.
Phases 2 and 4 of 'Letters and Sounds'
Complemented by workbooks WR 12

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