This book was made with the new Details bundle, and two coordinating DSP packages: Delicate Desert and Dry Brushed Metallic. When open and secured with the hidden magnets you see the star shape.
I watched this video: https://youtu.be/EW__mrz9UfE
Here are my measurements in inches. Using three different colors of cardstock:
11 x 5-1/2 (Cut 6)
8-1/2 x 5 (Cut 6)
7 x 4-1/2 (Cut 6)
Fold all cardstock in half
Decorate only the smallest pages
Before applying 5-1/4 z 5-1/4 DSP to front and back covers, attach magnets for closure
Largest sheets: attach back to front using Tear & Tape on three sides (not the fold side). Don't apply tape all the way to the spine.
Middle and smallest size sheets: apply Tear & Tape only on the outside edges (on the back)