Anyway, check it:

The purple triple-decker Harry Potter Knight Bus will be parked outside the Main Library (Grove St. side) from 11 a.m.-2 p.m. on Wednesday, July 11, and a couple hundred kids who won the chance in an online drawing will get to board the bus and make a video about why they love HP. [See image to the right. -- SFist] The bus moves on to Oakland in the afternoon, concluding its 37-city library tour of the U.S.

Expect kids of all ages in wizardry costumes, great picture opportunities, live performances, and librarians literally out in the sunlight, tomorrow from 11 a.m.-2 p.m. at San Francisco Public Library-Main Branch; 4 p.m.-7 p.m. at Oakland Public Library-Main Branch