From krazydad, constructor of the wildly popular and addictive puzzles published in The New York Times as Two Not Touch, here are 360 of your favorite Star Battle puzzles. These puzzles will provide a healthy diversion for you in these challenging times, and help you make it to the other side with your sanity intact! Includes an instructive and pithy tutorial.

Prepare to be obsessed. Match wits with the experts who created Sudoku. Arranged from “Easy” to “Very Hard,” here are over 300 logic puzzles that celebrate the compulsive joy of Sudoku with symmetry, smartness, and elegance—qualities lacking in computer-generated puzzles. It’s fiendish fun…every puzzle is designed by an author who anticipates your next step and obscurest the path, while never leading you into frustration.

A major challenge in constraint programming is to develop efficient generic approaches to solve instances of the constraint satisfaction problem (CSP). With this aim in mind, this book provides an accessible synthesis of the author's research and work in this area, divided into four main topics: representation, inference, search, and learning. The results obtained and reproduced in this book have a wide applicability, regardless of the nature of the problem to be solved or the type of constraints involved, making it an extremely user-friendly resource for those involved in this field.

Murder Most Puzzling is a gorgeous and witty book that invites readers to play detective and solve a series of absorbing, murder-mystery-themed puzzles. Readers are cast as the faithful sidekick to amateur sleuth Medea Thorne in order to solve 20 puzzling cases. Meet a cast of colorful characters—from ghost hunter extraordinaire Augustin Artaud, to Leonard Fanshawe, a competitor in the Annual Perfect Pickled Foods Festival. • A witty riff on the classic whodunit that brings out everyone's inner detective • Each mystery is sumptuously illustrated. • The mysteries require different deductive tactics, making them a good brain exercise A body in the topiary garden, a death at a clairvoyants' convention, and the mysterious accident of the boating lake—prepare for a whirlwind adventure, laced with humor and a dash of the macabre. This book will delight fans of Agatha Christie, Arthur Conan Doyle, and Edward Gorey. • This is a collection of darkly humorous puzzles. • Features illustrations in a gorgeous gothic style by Stephanie von Reiswitz • Perfect for Edward Gorey fans, mystery buffs, puzzle addicts, and fans of true crime podcasts and TV shows • You'll love this book if you love books like The Gashlycrumb by Edward Gorey, File Under: 13 Suspicious Incidents by Lemony Snicket, and The Composer Is Dead by Lemony Snicket.

From krazydad, constructor of the wildly popular and addictive puzzles published in The New York Times as Two Not Touch, here are 360 deviously tricky Star Battle puzzles. If you bought the previous book, Krazydad Two Not Touch, and reached the end of it, you know the puzzles started easy, and kept on getting harder. These puzzles start out at a challenging level (much harder than the Times), and just keep on getting more diabolical! All of these puzzles can be solved without resorting to trial and error.Includes an instructive yet pithy tutorial.

The puzzles in this collection of treacherously difficult puzzles will stretch even the most advanced Su Doku enthusiast. You will need to use all of your best solving techniques to get to the end of this testing challenge. The puzzles in the collection are of the highest quality and are perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles. Guaranteed to provide hours of mind-stretching entertainment.

You'll go cuckoo over these sudoku variants! Shake up the typical solving experience with these wild sudoku, perfect for fans looking for something a bit different. First, warm up with a few normal-size puzzles that will teach you the different variants. Then tackle the giant samurai-style sudoku made of five overlapping grids, each with its own unique twist. You must solve all five grids together to complete the entire puzzle. It's crazy fun!