Birmingham-based publisher Keen Communications announced that it has acquired most of the publishing assets of Nature Study Guides, a family-owned line of pocket-sized guides for field use, covering subjects such as trees, flowers, ferns, tracks, constellation, among others.

The guides have been offered through Keen as a client service since 2008, when Keen acquired Wilderness Press, which specializes in outdoor books and maps.

The publisher will transfer Nature Study Guide's administrative operations from Rochester, N.Y. to the Keen offices in Alabama. Publishers Group West will continue to distribute Nature Study Guides, and Keen is currently considering new titles for the line for future publication.