To build the book here is what you need:
1-Double-sided patterned paper 4.25"x 12"
3-Solid paper 4"x12" (1 piece of 12 x12 paper works perfectly)
Score patterned paper at 1", 6.5"; 7"
Score 1 solid piece at 5.5"; 9.75" (trim paper at 9.75" score line)
Score remaining pieces at 4.25"; 8.5"
Taking Patterned paper fold at all creases. At 1" crease insert large end of solid paper and fasten with brads.
Take 2nd piece of solid paper and glue to equal sized flap at end of attached solid piece.
Take 3rd solid piece and glue larger end onto shorter end (will not match up size wise)
Accordian fold pages down until they tuck into album. Refer to video to see how this should look.
If there are enough questions or interest I can film a tutorial on this if needed.