The library has a new version of Books In Print from Bowker located on the Online Databases page. The OCLC version will go away at the end of August. I think you will prefer the new version.You can also search for books currently in print by going to Blackwell's Bookshop where you can search for titles in the upper right.
To obtain bibliographic information for books that are out of print, I suggest using WorldCat, also available on the Online Databases page. To find out what an out of print title may cost, if available, try Alibris or Amazon.com.