Kerry Garrison Writes the "Official" 3CX Book & It Will Be Here Shortly
If you are interested in the "unofficial" 3CX phone system book that I co-wrote with Robert Lloyd --it's available immediately and can be purchased at the link below. Some reviewers of the book have noted that especially good chapter is where we look at what needs 3CX fills great and where it doesn't shine as much. Other excellent content is work arounds and real world senarios like integrating to analogue pbx's.
Kerry Garrison is authoring an additional book on the 3CX phone system which is sponsored by 3CX, 888VoipStore and some other and will be available soon according to the http://www.3cxbook.com/. I am sure this book will be excellent and I need to say I really like the cover! ;-)