This manual has been written for vtiger CRM users and administrators. I expect most readers will have some familiarity with Customer Relationship Management concepts. Although I provide a description of all features as they are implemented at the release date, this book may not be suficient as your only vtiger CRM reference. This depends on your needs and experience but also on the progress vtiger CRM makes. For a list of some other good resources, consult Appendix: Ressources.