Do you read one book at a time, or several simultaneously?

[Fame1977 2]

I tend to read more than one book at a time. Usually upwards of 3. I

[t1lersm0m1 23]

I only read one at a time, I don't think I could keep storylines straight if I didn't. I sometimes have a hard time getting invested in a new book's characters after finishing a really good book.