It is hard to find info on these older Newberry honors and winners.  Again Barefoot Books was the source of this summary:

A rich and satisfying biography of the prairie president. Here is the real Lincoln—in his gauntness, his gawkiness, and his greatness—the backwoods boy who became President and saved the Union. Originally published by: Wilcox and Follett in 1950.

A Newberry Honor in 1951.