Mr. Wells runs a bookshop and he can't remember where he put his black dog book. Britt and Beth first find a thin book and then a thick book, before finding the missing book. This B-level story uses engaging decodable text to raise confidence in early readers. The book uses a combination of sight words and short-vowel words in repetition to build recognition. Original illustrations help guide readers through the text. Author Cecilia Minden, PhD, a literacy consultant and former director of the Language and Literacy program at Harvard Graduate School of Education developed a specific format for this series. Books in this series include author biography, phonetics, and teaching guides.