Brian, I do not know a book with the same topic, but if what you liked about the book A Thousand Splendid Suns was its capability to take the reader to another far away world as if it's on another planet and keep you immersed and on your toes then I recommend the following books which do that in a similar writing style:

Alchemist by Paul Coelho

Autobiography of a Yogi by Yogananda Paramhansa

The Old Man and the Sea by Ernest Hemingway

Chess novel by Stefan Zweig

Kokoro by Soseki Natsume

Siddharta by Hermann Hesse

And there is a film that you might like since you like the mentioned book and that film is Incendies by Denis Villeneuve.