I confess that I joined Pinterest because I wanted to be entered in a contest to win $500 of free clothes. I had no idea what I was doing, but I figured out enough to pin five pictures to my board. Pinterest Kickstart by Heather Morris and David Todd was a nice book to help me better understand Pinterest. After reading the book, I consider Pinterest as both a social networking site and also as a medium/tool for working with ideas.
Pinterest Kickstart is both a technical book and an idea book. It talks about how to navigate Pinterest and describes some of the apps and sites to use with it. The book also describes uses for Pinterst, everything from planning a wedding to promoting an event.
For those of us who are visual thinkers, Pinterest Kickstart offers inspiration. I already started to put my reading list on Pinterest. The book is relatively short and not particularly technical, but it is a good starting point for those of us new to Pinterest.