16x16 Hyper Sudoku: Volume 1 (Paperback) (ISBN-13: 9781494392086)

Hyper Sudoku is just like regular Sudoku, but with four additional boxes that must also follow the "one digit rule".

The extra boxes make the puzzles more interesting than plain 16x16 puzzles, offering more ways to use logic to solve the puzzle.

All of the puzzles in this collection can be solved using basic logic. No trial-and-error or advanced strategies are required.