I'm interested in events that took place in and around the Ypres salient in WW1. I bought this book to assist me in research before going to Ypres and whilst there (in a camper). We stayed for 3 days and realised that it wasn't enough.
The book made it clear what happened during the 1st battle and we used it to do a cycle tour of the historic places of interest.
Since our visit I have bought Major Holt's book and map, during 2010 we will re-visit Ypres for our second visit to dig a bit deeper into the area.
If you are going to Ypres and are interested in WW1 I recommend this book, it contains many photos, battle maps and essential information.