RODEO PUP is a children's book writeen and illustrated by Lisa Rotenberg. Published in Canada, USA and Korea, readers are invited at the end of the book to e-mail Rodeo Pup and he will write them back.
Although the book went out of print in 2000, Rodeo Pup continue to receive e-mails daily. A letter goes out to each child (the same letter) from Lisa's computer.
eMail Rodeo Pup here