- "Into the Silence: The Great War, Mallory, and the Conquest of Everest" by Wade Davis. I've read a lot of books on this period, and this one is the best at providing context to why they were there, how Mallory got picked, the team dynamics, and other key folks like Norton.
- "Everest - The First Ascent" by Harriet Tuckey. This one is very biased, and really about the 1952 expedition, but I like it because it really gets into what was different in the 50s vs the 20s (especially little things, like keeping healthy and properly hydrated, and cultural things like feeling like it's OK and not ungentlemanly to practice and train).
There's this idea that the '24 expedition went with the goal of getting Mallory up the mountain, but that's not really what happened at all. Mallory and Sandy Irvine (a distant relative of mine) ended up on their attempt as the result of a lot of game-time decisions made by them and the leaders of the expedition. The same decisions lead to Edward F. Norton holding the world altitude record for 30+ years, despite being far from the best mountaineer in the world, or on the expedition.