Few months after releasing Exchange 2013, Microsoft has published the CHM files for Exchange 2013 to help customers to deploy, configure and use Exchange 2013 in On Premises and in Hybrid mode with Office 365.
Don’t forget, the hybrid mode for Exchange 2013 requires an Office 365 tenant using Exchange 2013 (still in preview/beta mode); current Office 365 (running Exchange 2010) is not yet compatible with Exchange 2013 as coexistence between Exchange 2013 and Exchange 2010 requires Exchange 2010 SP3 which is in beta.
You can download the 2 CHM files (one for On Premises, one for Hybrid) here http://www.microsoft.com/en-us/download/details.aspx?id=35395