Marc Kornblatt started his children's writing career working on books for the Time Machine and Time Traveler series. He's still writing (non-interactive) books, including the novel Understanding Buddy.
Marc Kornblatt's Page [Dead Link]
A former Time Machine author, Marc Kornblatt has moved on to filmmaking. His personal domain name is no longer active as of this writing. https://web.archive.org/web/*/http://www.marckornblatt.com/
(last verified: 2017-12-07)