The objective for students studying English as a second or foreign language is to understand, speak, read, and write in English. The number one challenge for teachers of English in a foreign language (EFL) setting is providing their students with adequate comprehensible input—listening and reading opportunities students can understand—to facilitate the acquisition of those four skills. In the case of reading, there are many choices. Educators need to know that the materials they choose are both effective and efficient. In the end, they deserve to know that the books their students read facilitate real growth in English.