Recommend a Photoshop book aiming at Webmastering skills (mainly cutting layouts)

#1
Hi all :)

I'm going into front-end development and more and more job offers require some basic Photoshop skills, mainly for cutting layouts (i.e. single page views prepared in Photoshop). Can you recommend some books / chapters in books that have tools mainly for these kind of tasks? Some basic graphics processing / manipulation would be nice too.