There are two ways to rotate photos in your book.
1. On each photo you will see a pencil, a star, and a trash bin 
while browsing your book. The pencil is to “customize”, the star is to “use as cover”, the trash bin is to “delete”. Click the pencil on the photo you want to rotate: on the left, you will see two arrows that allow you turn the picture.
Click the the right arrow to rotate the photo clockwise and the left arrow to rotate counterclockwise. Don’t forget to click the “Save” button after you make changes.
2. Click the 
button in the upper, left-hand corner and you will find yourself on the editing page. Click on the photo that you would like to rotate and click the “Rotate” buttons 
.