I've used the blank address books for one of my kids autograph books. He tries to have the characters sign in their section (i.e. Pooh under the Ps, Mickey under the Ms, etc.). It's small enough to fit in a fanny pack.
This time, my daughter doesn't want to use the same book (hers was a diary type) that she used the last two trips, so she's just taking a blank journal that she got for Christmas.
One option to "hook it to you" would be to tie some ribbons around the binding, then clip the ribbons to your belt/fanny pack, etc. Be sure it's a secure binding though. The journals would work fine, but the diary my daughter had slipped into the cover, so I wouldn't trust it.