Ok so this isn't a recommended reading book but it is an excellent job aid!  Every now and then you find a product that makes a good desk reference guide.  The problem with most desk reference guides is they are lengthy volumes rather than quick, tactical how-to guides.  This Microsoft Office 2007 Complete Quick Start Card Bundle contains 14 Handy Software Reference Guides that provide direct and tactical tips to the Microsoft Office suite. 

You get 14 tri-fold reference guides for Word, Excel, Outlook, Outlook WA (Web Access), PowerPoint, Publisher, Access, Project, InfoPath, OneNote, Groove, Vista & Internet Explorer 7 & Visio

You can get them from Amazon so give them a look!