Adam Mock, president of the Medallion Media Group, has been promoted to acting COO of the company, while senior v-p Ali DeGray has been promoted to president and Medallian Press v-p Heather Musick has been promoted to Medallion Media Group senior v-p.

The changes come after a big year at Medallion Media Group that included the launch of TreeBook, the Timed Reading Experience E-Book, an innovative new technology that will allow authors and publishers to embed multiple storylines, or narrative branches, into a story that can be triggered by a reader’s behavior or even lack of action. In 2013, Medallion’s 10 year anniversary, the company will release the first TreeBook format e-book, The Julian Years by Gregory Lamberson.

“We are in the midst of grand changes at Medallion, and 2013 is shaping up to be our biggest year yet,” said newly appointed COO Mock.