With your membership we are pleased to be able to offer signed copies of PiHKAL and TiHKAL. These are the soft cover edition of the books, signed on the title page by authors Alexander and Ann Shulgin. Our thanks to Sasha and Ann for signing these books to help Erowid raise much-needed funds to continue operations.

All proceeds go towards the continuing development of Erowid Center and public educational resources.