Designed%20for%20expert%20puzzlers%2C%20this%20collection%20is%20packed%20with%20our%20trickiest%2C%20most%20mind-boggling%20Hidden%20Pictures%20puzzles%20–%20without%20picture%20clues!%20Each%20book%20contains%20more%20than%20100%20intricate%20puzzles%20paired%20with%20only%20a%20list%20of%20objects%20to%20find.%20And%20for%20true%20puzzle%20masters%2C%2016%20puzzles%20come%20with%20no%20hints%20at%20all.%20Just%20right%20for%20experienced%20puzzlers%20ready%20to%20advance%20to%20the%20next%20level%20of%20difficulty.