Treasury of 300 puzzles features 3-D and chess puzzles, connections, dissections, foldings, geometrical and number puzzles, logic problems, matchstick puzzles, mazes, moving pieces, put-togethers, strimkos, sudoku, and visual and word puzzles.
Peter and Serhiy Grabarchuk are part of the Grabarchuk Puzzle Family. Over a period of decades they have produced puzzle books, puzzle apps, interactive puzzles, and more.
