I made a hideous discovery in Heffers, the Cambridge bookshop, just before I got married: The Springer Yellow Sale. A very dangerous event for the wallets of wannabe mathematicians. In the Yellow Sale, plenty of Springer maths books are pretty much half price. This reduces them from eye-wateringly expensive down to just plain expensive. Who can resist half-price introductions to p-adic numbers? Suffice to say that, despite my already huge maths book backlog, I've now got a few more lined up. Ho hum. I'm weak. Sale ends at the end of July!