Twisting Free can be purchased via credit/debit card, PayPal, or eCheck, from the Alternating Current website shopping cart using this button:

Twisting Free can also be purchased via check drawn on a U.S. bank account or U.S. money order, for $5.00 + 2.00 shipping, going to a U.S. postal address (International orders must pay online only.), by making checks payable to ANGSTMAN ARTS, and mailing them to:
Alternating Current
PO Box 183
Palo Alto, CA 94302