Media praise for PayPal APIs: Up and Running

"Developers looking at transaction services must have this reference to a key internet commerce component."
-- James A. Cox, The Midwest Book Review: The Bookwatch, August 2011, Volume 6, Number 8

"A worthy upgrade to the first edition, this time not PHP but enumerated in Python. Does a good job of plotting & describing PayPal's increasingly byzantine "workflows" to bop payments back and forth."
-- Leo M, Developer; Sys Admin