»Three Sisters

I accosted a young man with an old timbuk2 bag who was reading this on the bus, and told him, "That looks like the bridge right near where I used to live. It's either the Sixth or Seventh St. bridge,", and he accomodatingly turned to the colophon, which informed us that the cover showed one of a trio of bridges across the Allegheny River. Macmillan Technology books have a nice bridge theme going; I suspect that's the real reason I bought their LDAP book.