I scanned in images of of the front, spine, and back cover of my full-sized Saige book to make the pattern for the mini book. As a gift to you, I would like to share the template I made so you can make your own mini books. Just download the pictures, paste into a word doc at original size, and print on shiny photo paper.
Use this pattern to make a softcover book. Just trim around the cover, cut pages to fit, stack, staple, and fold.
Use this pattern for a hardcover book. Use a small notebook or an existing mini book. Cut out the cover, leaving enough space on each side to make a flap. Wrap the cover around your hard-back book and fold the flaps inward.
Have fun making mini books for your dolls, and check out this post for another fun template.