Sudoku Sums: A New Kind of Puzzle From the Leader in Sudoku Puzzles! Twice the Clues, Twice the Fun: Ages 9-99

by: Riley Ph.D. · James E. Good Year Books · 2006 Ppb. details (USA). details (UK). details (Canada). details (Germany). details (France). ISBN: 978-1-59647-108-5 ISBN-10: 1-59647-108-5