I finished The Inimitable Jeeves (which was loads of fun) and haven't picked up a new book from the library yet. I find that my in-between re-reads (books I must feel comfortable putting down when I've got something new) tend to be light, comic, fast-paced affairs. A book from the Georgia Nicolson series by Louise Rennison is always a reliable choice (they're young adult books and they're hilarious, fitting the bill perfectly). Any David Sedaris is great, as are either of the Bridget Jones novels.
Lately my between-new-books taste has been for Bill Bryson. I'm halfway through a re-read of I'm a Stranger Here Myself, a collection of the columns he wrote about American life for a British newspaper. Each column is about 6 pages long. They're laugh-out-loud funny, well-observed - all are excellent companions to breakfast and good stories to tuck yourself in with at night.