Textbook for industrial organization without calculus
Luis M Cabral : Introduction to Industrial Organization :- This book has a combo of game-theory and Cost curves. It explains strategic concepts using no calculus.
However, if you want more theoretical perspective , I would suggest reading the research papers (I have a course named Strategy , most of my readings are the journal papers on JSTOR or elsewhere). 

If you could just expand on what your course comprises of , etc ;  or give a link to the university website , may be I can tell you more books I know of.