Read the article at https://edtechbooks.org/-gXV
The 5th R (Retain) was introduced seven years after the 4R’s (reuse, revise, remix, and redistribute) were identified. To provide access to literature, libraries were created to give people access to books when ownership was impossible. Now ownership is very possible, but the cost of textbooks is climbing to a point where institutions are trying to convince students to go back to an access model.
Open Education License Draft https://edtechbooks.org/-ktb