So Conn and Hal Iggulden's DANGEROUS BOOK FOR BOYS is proving to be quite the success over here after its popularity took the UK by storm last year. And because of this, reports USA TODAY's Bob Minzesheimer, we're about to see a slew of copycats, some of which are geared towards girls (as evident by the covers you see here.)

Collins executive Margot Schupf says similar books are "inevitable. Any success breeds copies." It also raised the question, "What about girls?" although boys are a tougher market for publishers. Such manuals, Minzesheimer writes, strike "a chord among parents who have a nostalgic/retro longing to share with their own kids the same kind of good, old-fashioned creative play, both indoor and outdoor, that they grew up doing.