'Cartoon Mouse' PreReader Product Volume 22 was designed as an assisted learning aide in word recognition and beginning comprehension through visual representation-to understand and to be able to read a complete sentence with comprehension. In this Pre-Reader the sentence comprehension is also to put together several sentences that read to the reader a story-sentence story with a complete story combining all sentences to give the reader additional information for a bigger story.Why's there no picture on the cover of the book. The books are designed so that the reader will remember the word to read or reread the book. Comprehension defined as understanding the meaning of what is written.