Keeping up with books you have read, want to read and sharing that with your colleagues is a lot easier using one of the popular book tracking web sites. I use www.shelfari.com in the past and now have started experimenting with Reading List by AMAZON. Reading list by AMAZON is integrated with LinkedIn. I like being able to recommend a book on my Amazon reading list and have my LinkedIN connections read my comments on the book. I can see what they recommend.
Check out http://www.shelfari.com/ It looks like a book shelf where you see the covers.
shelfari web site
or inside LinkedIN, check out
Reading List by AMAZON
Reading List in LinkedIN by AMAZON