When the going gets tough, what's a wimpy kid to do? Nobody knows how to survive the rough and tumble halls of middle school better than Greg Heffley. In fact, he's got a three-ring binder chock-full of notes on his school's biggest bullies--along with his hard-earned strategies for how to outsmart them. But when Greg's binder falls into the wrong hands, his world starts to unravel. Now it's a race against time before the bullies discover the identity of the person behind it. Greg has learned to roll with the punches, but now he's backed into a corner with no good options. Will he throw in the towel, or go down swinging? One thing's for sure-- Fight or Flight is a knockout! Collect all the books in the #1 bestselling Diary of a Wimpy Kid series: Diary of a Wimpy Kid (#1) Rodrick Rules (#2) The Last Straw (#3) Dog Days (#4) The Ugly Truth (#5) Cabin Fever (#6) The Third Wheel (#7) Hard Luck (#8) The Long Haul (#9) Old School (#10) Double Down (#11) The Getaway (#12) The Meltdown (#13) Wrecking Ball (#14) The Deep End (#15) Big Shot (#16) Diper Överlöde (#17) No Brainer (#18) Hot Mess (#19) Partypooper (#20) Fight or Flight (#21) See the Wimpy Kid World in a whole new way with the #1 bestselling Awesome Friendly books, told from the perspective of Greg Heffley's best friend Rowley Jefferson: Diary of an Awesome Friendly Kid: Rowley Jefferson's Journal Rowley Jefferson's Awesome Friendly Adventure Rowley Jefferson's Awesome Friendly Spooky Stories Rowley Jefferson's Awesome Friendly Spooky Stories 2.