The eagerly anticipated new HTC EVO 3D for Sprint just had its user guide released to the public for download. Perhaps this will give you some "light" reading before you actually get your new EVO 3D. It's only 315 pages, and if you read it now, you will already know the ins and outs of your device before you even unbox it. It goes into the everything from the hardware, to the OS, to the Sense UI 3.0. Have fun!
Source: SprintDroids and Evo3dForums via AndroidCentral and Sprint Support User Guide for HTC EVO 3D