I thought I'd have a try at cutting out Eileen Hull's Journal Die in faux leather, and extending it to create pockets on the inside.
Join the spine in the normal way, and then either sew or in this case I just glued down the top and bottom edges to create pockets.
I threaded three elastics through the spine for my three local travel guides. Now when my visitors want to head off and explore, they have local maps of the area all in one place, along with a couple of inside pockets for tickets etc.
You could also used a lighter weight fabric and slip a piece of card inside the pocket to strengthen it.