Great question, Natalie!
Here are some reading ideas to consider, including a few with aspects of medicine (asterisked):
*All Creatures Great and Small, series of 4 autobiographical books by a British veterinarian)
The Red Badge of Courage
The Call of the Wild
(Read a summary, watch the play, then read it)
Why We Can't Wait
*Brave New World
The Hiding Place
See article, "Igniting a Passion for Reading," Edutopia.org regarding the role of choice in students becoming lifelong readers.