Explode the Code Books 4, 5 and 6, second edition, sold together as a three-book phonics workbook set. ISBNs: Book 4 9780838878040; Book 5 9780838878057; Book 6 9780838878064. The books are pre-owned. Covers show light handling; interior pages have not been checked page by page for writing or completeness. The three books pictured are the only items included. Please review all photos for condition.