Do they sell books for summoning demons or anything related to the supernatural?

I found a hardback copy of Crowhurst's Stella's Daemonum which has been really informative. I also saw a copy of Frater Perdurabo's Magick which, as you may know, includes considerable information for ceremonial work. I pray that you consider whether you have accomplished the necessary background training prior to moving forward with your desire to summon demons. Having said that, Bishop at the store is well versed in Thelemic practices and the OTO and, having much more experience in this area, should be considered a powerful resource to aid you in your path

Thanks for the help. I was also wondering if there was anything on how to remove curses.