Remember those cool Choose Your Own Adventure books? We do, and we were obsessed with them. Which is why we're so excited about today's Five-Year Birthday Week giveaway courtesy of the amazing Brooks Running---it's kind of like those books! We give you a few parameters, you make a decision and then the fitness adventure begins! Here's how it works: you scour the Brooks Running PureProject site for the shoe you want here (our recommendations and rave review can be found here), and then you leave a comment telling us what shoe from the PureProject line (PureDrift, PureConnect 2, PureFlow 2, PureCadence 2 or PureGrit 2) you have selected for your adventure, and then tell us what fit adventure you'd like to tackle with them on! Fun, right? We'll select a lucky random U.S. reader to win in about a week and notify her via email and in the comments. So let's get to it---choose your own fit adventure! ---Jenn