Paul Kalanithi was diagnosed with stage IV lung cancer at the age of 36 just before completing a decade of training as a neurosurgeon.
In his heartbreaking and posthumous memoir, "When Breath Becomes Air", Kalanithi explores the big questions surrounding how the prospect of death can impact what makes life worth living.
As the Times' review explains, Kalanithi offers a "gripping" look into the life of a doctor treating patients one day and being one the next:
I guarantee that finishing this book and then forgetting about it is simply not an option. There is so much here that lingers, and not just about matters of life and death.
— Bereaved Families of Ontario - Midwestern Region (@BFOMR) March 3, 2016
The book made its debut on The New York Times Best Seller list for the week of January 31, 2016.
Click through the nonfiction New York Times Best Sellers list below:
More from AOL.com:
Stores moving to cage-free eggs, but are they really worth it?
Climate change is all too real in Kenya, where drought and famine affect millions
One Facebook trick to prevent embarrassment