Dandelion Readers, Level 2 introduces 2 or 3 alternative spellings for the vowel sounds presented in Level 1, for example Book 1 'Viv Wails' introduces the spelling of 'ai' 'ay' 'a' for the sound 'ae'.
This 14 book vowel digraphs set can also be used as a Special Needs resource for older children who are learning the phonic code at a faster pace.
Dandelion Readers - Reading and Spelling Activities - the Extended phonic Code Level 2 Workbook also available which complements this set of books.