SIOUX FALLS, S.D. (AP) — The autobiography of prairie author Laura Ingalls Wilder is expected to jump to about 145,000 copies in print by mid-summer.

South Dakota State Historical Society Press Director Nancy Tystad Koupal said Friday the small state-owned publishing house is ordering two more print runs of the book totaling about 20,000 additional copies. “Pioneer Girl: The Annotated Autobiography” was edited by Pamela Smith Hill and was released in November by the publishing house.

The memoir has been a best-seller.

Tystad Koupal says the additional 20,000 copies should keep the book stocked in stores when the holiday shopping season begins.

The book was written for an adult audience and gives a more realistic, grittier view of frontier living than Wilder’s popular children’s series of “Little House on the Prairie” books.