on 6 May 2012
Very useful to get a more complete understanding of the subject. Doing the questions using the answers in the back of the main text book is difficult so the worked solutions let you understand where you went wrong if you can't get the right answer. If you've got the main text book, I think this is worth getting because you do get much more out of doing the questions than just reading the text book. Disadvantage is that it is a bit expensive.