Try “Shackelton’s Boat Journey”, by F.A. Worsley. Worsley was the Captain of the Endurance as was among the men chosen by Shackleton to make the crossing to South Georgia.
“Shackelton’s Boat Journey” covers a lot of the same ground as “Endurance” but I found its grit and grain of its story telling very compelling. Highly recommended even for someone who has already read “Endurance”.
Thanks, I’ll look for it. Gonna be hard to top “Endurance,” though.