Nina Hoffman, president of National Geographic Books, will be stepping down at the end of the year, according to a memo obtained by Society Matters.

International SVP Declan Moore will “immediately begin the process of recruiting” a replacement. Meanwhile, the books division will look like this, Moore writes:

Barbara Brownell, VP and Editor in Chief, will report to me on editorial matters, and Carl Mehler will report into her.

Hector Sierra, Chief Operating Officer, will report to me, and Linda Howey (VP, Retail and Special Sales) and Ruth Chamblee (VP, Trade Marketing) will report to Hector. Jeff Reynolds will report to Ruth.

Heidi Vincent (VP, Direct Marketing) will report directly to me.

Children’s Book Publishing will continue to report to Melina Bellows, EVP of Children’s Publishing and Chief Creative Officer for Kids and Family, who continues to report to me.

No mention was made in the memo of where Hoffman’s headed.