http://mpss.mhhe.com/contact.php (email)
http://mpss.mhhe.com/ (chat)
800-331-5094 (phone)

Support Hours:

Monday-Thursday  8:00am to 11:00pm
Friday  8:00am to 6:00pm
Saturday  11:00am to 5:00pm
Sunday  6:00pm to 11:00pm