A lame attempt at paranormal chick lit. Not worth the paper it was printed on. Insulting and shallow, with the whole paranormal twist seemingly tacked on with no internal logic or explanation. I was drawn in by the idea of the imaginary friend showing up for real, but the potential is-he-isn't-he is dashed in the very first page, when we've got narration from the imaginary friend's POV, and then the authors didn't even try and do anything interesting with the whole imaginary friend community thing they've set up. It's all just hand-wavy, and the heroine is all of the worst aspects of "chick lit" romancey heroines rolled into one. It goes through the motions of a wacky, interesting set-up and manages to be neither wacky nor interesting.
Also, WTF. The heroine gets dressed up and walks twenty blocks in four inch heels, after never wearing heels? My credulity can only be stretched so far.