Microsoft Dynamics GP 2013 Implementation
Microsoft Dynamics GP 2013 Cookbook
Microsoft Dynamics GP 2013 Reporting - Second Edition
Microsoft Dynamics GP 2013 Financial Management
Developing Microsoft Dynamics GP Business Applications
Building Dashboards with Microsoft Dynamics GP 2013 and Excel 2013
GP2TheMAX: Helping users get the MAX from Microsoft Dynamics GP
Microsoft Dynamics GP 2010 Cookbook
Implementing the Microsoft Dynamics GP Web Client: Implementing the Microsoft Dynamics GP Web Client
The MS Dynamics GP Power User Guidebook Have a look at any of those books on Amazon ! they are Worth every penny !