I had a friend who used to work there. He got his copy of "The Killing Joke" signed by Alan Moore 'cause they have visiting artists all the time. It's definitely worth a trip if you appreciate the broad spectrum of British cartoons and comics, but don't expect stumbling upon any rare Eisner gems as I'm pretty sure it's strictly U.K. artists and authors, but don't quote me on that. Admittedly it can be kinda boring, unless caricatures of the queen and Regency era cartoons about colonialism is what gets you going(and you thought modern British humor was dry...).