Luke Alexander recently created a sick sketchbook series of imaginary treehouses. The colored pencil drawings are based around the wild and colorful architectural structures of this the artists imagination, with quirky homes that will have you feeling like a kid again. I really like how they're created inside these little thumbnails and grouped together based on the time of day. Some feature twinkling stars while others show a glowing sunset...Some have crazy patterns, odd shapes, and multiple levels yet the entire series works so seamlessly as a whole. Which treehouse would you choose to live in?