10 Advanced letter-size book mockups for the purpose of presenting your book layout design; both cover and inner pages. The detailed and organized PSD files give you the ability to customize each scene to perfection. Lights, highlights, shadows, object colors, and background colors are all editable. Help documentation is included as well as a PDF file. This item is another variation of our popular previously added A4 book mockup. Pages come in letter sizes of 8.5 x 11 inches / 21.6 x 27.9 cm.