Another piece the same height, but much wider will be your cover. Cover the above as if it was one piece. You only need to hinge your front cover, but hinging the back is also an option. Sandwich pages in between the covers and use whatever binding you wish to bind it all together. Use a circle cutter to cut out pages and covers.
Beads also make great closures.
Sprinkle embossing powder or Art Institute Glitter on it. Bookmark tassels are great for putting around the spine of a 4-inch tall book. 3 Pieces of double-sided tape were used here for decoration. After putting the tape in place, I dipped it in Wild Fiber. Art Fibers were used as a closure with beads hanging off the ends.