The general organization and philosophy of the course is based on that of the reference textbook by Anderson & Anderson. Geomorphology: the Mechanics and Chemistry of Landscapes (Cambridge), which can be consulted at University Library. Read the introduction (first 14 pages).
The Little book of Geomorphology is a free download text illustrating the application of the conservation principle to geomorphological processes. Read the introduction (first 10 pages).
https://instaar.colorado.edu/uploads/people/182/The_little_book_010708_print.pdf