In the US, to order Feathers and Light (ISBN 979-8-88531-121-2):

At amazon.com 
At barnesandnoble.com
At booklocker.com

Now, also available for Kindle!

 

To order Reluctant Gods (ISBN 979-8-88531-052-9):

At amazon.com
At barnesandnoble.com
At booklocker.com

 

 

 

 

Note: These books are printed after you order them. That can add several days to the delivery time.