I’ve used a PageKeeper bookmark for several years and love it. Once in place it stays put. You don’t have to do anything until you’ve finished reading whatever book you’ve put it in. It keeps your place for you without you having to move it, or dog-ear the page. Best of all it won’t fall out of your book, so no more flipping through trying to find where you were when stopped reading.
I’ve never seen anything similar to PageKeeper, and being a life long bookworm I’ve seen and used A LOT of bookmarks. I actually have two that I use, as it’s not uncommon for me to be reading multiple books at once. When I’m not using both, I keep one in my purse in case I pick up a book to read while I’m out.