I am usually reading two books and a magazine or journal at any given time, although not with any particularly regular switching from volume to volume -- I mostly just wind up picking up the one the suits my moment. Right now, I'm reading Titus Groan, by Mervyn Peake, Early Greek Myth: A Guide to Literary and Artistic Sources, by Timothy Gantz, and the May/June issue of Fanfare. (I don't know if I can legitimately count Godel, Escher, Bach, which is still in the stack and still bookmarked where I last stopped, but still isn't moving very fast).