If you would like to write to Riordan or send him books (new, paperback, and direct from supplier is the only sort accepted) he should receive mail (providing it is in a white envelope, has the return address and conforms to heretofore cryptic and unknown arbitrary rules) at:
Riordan Maynard #44844-013
PO Box 1000
FCI Loretto
Cresson
PA 16630
Unites States of America
For other enquiries please send a message to: