In the case of technical books, I have found that pricing is not that different from digital to physical books. This is a good example: https://www.amazon.com/

In the case of technical books, I have found that pricing is not that different from digital to physical books. This is a good example: https://www.amazon.com/dp/1449373321/ref=cm_sw_r_tw_dp_x_qQ8xFb653A4KQ https://www.amazon.com/dp/1449373321/ref=cm_sw_r_tw_dp_x_qQ8... It is $29.99 for Kindle and Physical is $34.91.