This is a very good news. Heisman is the author of at least one excellent book on endgame. IMHO, he is among top five contemporary endgame authors.
Anybody Want a free chess lesson with Dan Heisman?

Hope you'll consider joining the group "Dan Heisman Learning Center" as well!
http://www.chess.com/groups/home/dan-heisman-learning-center
Fellow Endgame Afficionados...
I'm really excited that my chess teacher and friend, Dan Heisman, has joined the Chess.com family. For those who don't know, he is a highly respected chess author of 10 books, and winner of numerous awards. Anyway, I've organized a little tournament to introduce people to Dan. First prize will be a FREE chess lesson with him - an $85 value.
http://www.chess.com/tournament/win-a-free-lesson-with-dan-heisman-open
Hope you can join!