My property professor worked with several others from different universities to create an open source property textbook, available for free in a pdf. If you wanted it in hard copy, as I did, it was the cost of the printing.
Open Source Property Spring 2019 https://www.amazon.com/dp/1729562140/ref=cm_sw_r_cp_apa_i_ARaBDbEP0YGQY
It's the cheapest textbook I've ever gotten.