Perhaps the most intellectually driven L & H book, an analytical bio., if you will. Their personal and professional histories are in a 5-section format, covering early years, character development, film technique, development, film critique, bibliography.
For the casual fan, this might not be the one; for the deep historian, it will be very satisfactory.
In today's internet world of mass researchers, one might hope for more detail, however, on "lost footage", rare photos, concentration on the 1945 to 1956 period, when they remained a working team, but the show business establishment didn't seem to care. There are other, lighter books out there, which will bring an even bigger smile for the determined sleuth.