The library app I use for downloading e-books calls my downloaded books my "bookshelf". At any given time I usually have 2-3 books on my bookshelf. One I am currently reading and two waiting to be read. They can be borrowed for up to 21 days and since I can usually finish most books in a few days to a week (sometimes two days, if it's a shorter book) I like to have another one waiting. Plus, most times I have to wait for it to be available and then download when it does.
The book I am currently reading is called The Orenda. I am loving this book so far. I'm only about 1/3 of the way into it, but find it a hauntingly, beautiful story. It's set in what will become Canada in the early 17th century. Told from the perspective of the 3 main characters, an Indian warrior, an Indian girl (from a different tribe) and a Jesuit priest.
Waiting on my bookshelf is Mary Shelley's Frankenstein. I haven't read very many classics and it may become one of my book club reads, so will give it a try.
The rest of the books I want to read are still on my "on hold" list and haven't become available yet to add to my bookshelf. I have quite a few reserved. That way, usually something becomes available often and I'm never without something to read. You just never know how long a wait it will be. And it's a hobby that I can spend hours a week on, for free.