Modifying Excel Ribbon for Executing AddIn Sub Procedures

Look for the book

RibbonX Customizing the Office 2007 Ribbon

by Robert Martin, Ken Puls, and Teresa Hennig

The Ribbon interface really hasn't changed since then, and this will apply to 2010 and (I think), 2013 and 2016.

There is also a much less expensive Kindle book (but I have not used it, so cannot say how thorough it is):

OfficeFest 2007: Customizing the Ribbon in Microsoft Office 2007/2010