Time to unplug! We love our tech, but its always good to get away from it once in awhile. Next time you travel, pick up a Sudoku puzzle book from Traventurz to give your eyes a break from staring at a screen, and your mind a break from social media. At 5.25" x 8.00" it's the perfect size for any carry-on bag. Sudoku is an incredibly engaging number puzzle that is not only fun, but also good for your brain! In this book, we've included FIVE different levels of difficulty ranging from EASY to GRAND MASTER. Hone your skills, sharpen your memory, and work on your cognitive capabilities with these great puzzles. You'll be hooked in no time! Let us know which difficulty is your favorite!