This book is about how to run services, in any organisation, in any industry. It describes the basics, the core stuff, in realistic pragmatic terms. And it is pragmatically brief - we kept it to 50 paperback pages.
Here is a PDF which a collection of articles I did for Beetil and for Citrix on ITSM for smaller organisations: Sensible Service Management. They've made it look real nice and I think the content is pretty good if I say so myself. Most of all it is free and not hidden behind email registrations either! It is drawn from the BSM book