I do not recommend the One Spirit Book Club membership. After being a member for about 2 years, I decided to cancel my membership.
They don't stop sending you the selection packets, however. I have written two letters and sent one email yet I am still getting their mailings. They want you to send in a card if you don't want the book featured that month.
I have instead been sending the packet back as Refused, Return to Sender. I had hoped that this would deter them since they have to pay the postage but it has not.