Book excerpt: Finally, mazes you can really sink your teeth into! 50 Excruciating Mazes features six diabolically difficult puzzle types. Twisted: a traditional maze with plenty of twists and turns Vortex: loop through a dizzying array of spirals Shapshifter: one pattern morphs into another Jagged: a scintillating sawtoothed design Thorny: scads of short passages to get caught in Mindbender: nearly impossible to escape These mazes ain't kid-stuff! Each maze should take 15-45 minutes to solve. Think you've got what it takes? Then grab a pencil, and dig in.