Here's a complete book promo mockup you can use. Each book is compiled into it's own Photoshop group so you can easily add and remove objects.
tablet
Black Tablet and Coffee PSD Mockup
Browse a book while you have a cup. Yet another caffeine induced mockup that likes tablets. 6 x 9 it is.
Upright Tablet with Coffee Cup PSD Mockup
Try this mockup with (or without) a coffee cup. Fits the common 6 x 9 size. Placed on a modern wood table inside a studio.
6 x 9 Book Series with eReader PSD Mockup
6 x 9 Book Promo with ipad style eReader. I was inspired to make this from another mockup floating around. As always, you can use the stone background I've included or replace it with your own.
6 X 9 Book with eReader Promo PSD Template
6 x 9 Book with an iPad style eReader. This is the beginning of a series that I will be releasing. Use your own backgrounds to personalize.