Description Ralph needs to return a book, but he cannot find it anywhere. And now the alphabet has gone missing, too! It is up to Ralph and Delph to follow the missing letters. Where will they lead? The phoneme /ph/ is featured in this title. In Level 4/5 - Blue/Green, children will practice their knowledge in this level, and will learn to read and spell words which have adjacent consonants (for example, trap, strong, milk, and crept).