The Lincoln Canon: There are too many Lincoln books. Which are indispensable?

From the Washington Post:

Still, Americans have reason to be proud of their Lincoln literary cadre, especially of scholars like Douglas L. Wilson and Rodney O. Davis, who created the most valuable source of information on Lincoln, Herndon’s Informants (1997). It’s a painstaking compilation of the work of William Herndon, Lincoln’s law partner, who spent 25 years after the president’s death interviewing and corresponding with people who had known Lincoln. But it’s not a book for the general reader, and not all of the informants’ claims are necessarily to be believed.

Neither are some of the approaches to Lincoln over the past 50 years; they change with the times and with what’s ideologically fashionable….

My favorite and most revelatory Lincoln book of recent decades is Douglas L. Wilson’s Honor’s Voice: The Transformation of Abraham Lincoln (1998). It’s a gem: sensible, economical, solidly based on the evidence, the best account of Lincoln’s life up to the end of 1842.