MySQL books

Any mysql admin out there that would recommend a good book for a beginner just starting to look into mysql. I have a person here that is doing some access database stuff an he is starting ti implement more an more of databases for things here an knowing that access does not scale to well I want to get the jump on mysql before I have to implement something more then access can handle. Thanks in advance. jack PS have looked on amazon an i find lots of books dealing with mysql, just want to know which ones are useful an you find helpful. thank