Fun.
And fascinating. I have always admired people who use bookmarks. Well organized folks, I've always figured.
I generally have about 4 books going at once. Two by the bed and two in the van, one lighter and one heavier in each case. (The light ones get read faster.)
I have never used bookmarks, I go by memory. And if I can't remember something it's necessary to re-read it. I find myself vaguely enjoying reading matter which is sort of familiar until I get into stuff I know is new. Not a very efficient way to go.
Great post.
Arf