Almost positive that's mine, but I could be wrong. My girlfriend and I lost ours a few weeks ago roaming around Joe's / Upper Tier, but then we also took a stroll around to survey the cliffs in general so we were all over the place. Not sure where you found it.
Anyway; we don't want it anymore, we already bought a new one
Enjoy your spare guidebook! Give it to a nooby who doesn't have one!