Office 365 Administration Inside Out
Hey! It's finally here! After months of hard work (almost a year from when we started until a copy at my doorstep), we've finally made it to the finish line! Also, pay no mind to my poor cuticles!
Or jump straight to Amazon and order it: http://aka.ms/o365adminio
While you're at it, be sure to check out the blogs of the other authors, filled with all sorts of goodies:
Darryl Kegg, https://aka.ms/dkeggblog
Lou Mandich, http://blogs.technet.com/b/loum/