a little help, please...

[devika261 at aol.com]

No: HPFGUIDX 26394

Hey everyone,
I don't have my books with me, so I can't look this up, but I was wondering if anyone could tell me the name of the store in Diagon Alley where Harry and co. buy their schoolbooks?  Does it even have a name?  It's late, and I can't think very well right now, but it's going to be bothering me all night if I don't find out.  Please help!
Thanks a lot :)
Devika