This is a 2-page document that allows students to record and rate their reading. Two pages allows for 16 books/titles, but you can make additional copies of the second page for more space.
I glue the top of page two to the bottom of page one and fold the log upon itself. I then glue it into the back of my students' Reading Journals (I use composition books; you could use spirals or folders?).
My students enjoy this way of documenting their reading because it is short (doesn't require a lot of writing ;-)) and they love the "chance" to rate their books.
At a glance, I can track their choices, including genre variety and whether or not they are reading books below, at, or above their level.