This book lists 2- and 3-letter words, as well as all words with J, Q, X and Z that are between 2 and 7 letters in length. It also has 7-letter words that contain 2, 3 and 4 S's. And, it lists words for duplicate and triplicate letters such as A, E, I, O and U. Finally, it has 7-letter words that end with the letters A through Z (except for the words ending with the letters D, E, G, L, N, R, S, T and Y).