ter, MD comes this mind-bending collection of curiously zany riddles sure to challenge anybody bold enough to step outside the box and into The Wonderful World of dR slide. Perfect for those seeking to exercise their minds and sharpen their critical thinking skills, this one-of-a-kind book contains no answers, but rather directs you to an interactive website where, for each riddle, readers can submit their answer, ask for a hint if needed, or unlock the correct answer. The website features a leaderboard that allows you to compete with others to see just how well you do!