Sure thing, the Pink Floyd Encyclopedia by Vernon Fitch, a long time collector and fan, is one of the best books on Pink Floyd you may get. Certainly a mandatory read for any fan...
I just checked on
Amazon.com and unfortunately they are out of stock, but you can still get new copies for $18.39 from Amazon's Marketplace. Just click on
this link and then click on "Used & New from $18.39" for more information.