This book is a must for anyone involved in IHL or the LOAC, simply because it is a compilation of all the major conventions in this area of law. It is great for quick-reference and saves having to carry around multiple books containing different conventions... this one probably contains all the ones you need. Each convention also begins with a couple of pages on the history and purpose of the convention.
Unfortunately, as it was published in 2000, it is now getting a little old. As each convention is concluded with citation information (such as the UNTS location, date of adoption etc), several treaties that were listed as "not yet in force" are now actually active. Once again, I had to resort to the UN Docs Service to pull up current citation information.
Otherwise, it is an amazing resource and a must for any IHL lawyer or student.