Description Books 19 24 continue to reinforce consonant blends at the beginning and the end of words but now introduce long vowels a, e, i, o, u, where the spelling pattern is vc+ e. The vowel sound is made long by the silent 'e' at the end of the word. Books 19-24 reinforce all previous skills and include irregular past tense and hyphenated words. This title provides several examples of long vowels a, i, and u, through the story of the people who live and work in Dee Street.