This collection contains an amazing 500 puzzles, so it really is the ultimate crossword challenge! Enjoy many hours of using your word power and general knowledge as you attempt to complete them. • : Have fun putting them to the test and learn new words as you go! Give your mind a great workout as you solve each clue. Feel your stress melt away as you focus on these satisfying puzzles. Put your puzzle-solving skills to the test with the series. These puzzle books contain anywhere between 500 and 1000 puzzles to keep you entertained for hours on end.