Several books in this series can be found in the Top 25 Homeschool Sellers for 2006 list.
Explode The Code Book 5 introduces students to the word endings -ed and -ey, word families including all-alk, old-olt-oll, ild-ind, the digraph qu, and 3-letter blends. Students practice blending sounds to read and write multi-syllabic words. In addition, several review lessons are included.