Good Mobile Telecommincations Books

Hi all,

I have been looking at the range of GSM books available and there are quite a few. I am looking for some generic books which explain the GSM network procedures so that I can keep them as references. I obviously have the Internet which I use to gain a lot of the required information, however, most sites are acronym hell so it would be nice to have a good reference book at hand so that I can easily translate the information. I know that a few of you work with mobile telephones and cell site analysis so I was wondering if anyone had any suggestions?

Many thanks,

Sam