Books for beginner readers aged 3-8 (Foundation and KS1)
Decodable readers from UK

Dandelion Launchers introduce consonant digraphs ch, sh, th, ck, ng, and qu.
4 different books in each offer lots of practice at each level.
Phases 3 and 4 of 'Letters and Sounds'
Complemented by workbooks.

20 different books, 4 at each level (unit), introducing consonants digraphs.
Also, introducing adjacent consonants.

Unit 11: ch
Unit 12: sh
Unit 13: th
Unit 14: ck, wh
Unit 15: ng, qu