I picked up a copy of Thich Nhat Hanh’s “Our Appointment with Life” from Tibet Bookstore in Kathmandu. It cost 300 rupees (about $3), according to the sticker that’s still on my copy. You can purchase it on Amazon for $9.95 on Amazon.
I mean, if you’ve got the time I highly recommend traveling to Nepal, but unless you’re buying A LOT of books, it’s probably not economically sensible.