You can specify the type of files you want, for your device.Study Guide for Modern Refrigeration and Air Conditioning (text only) 18th(eighteenth) edition by A. D. Althouse,C. H. Turnquist,A. F. Bracciano | C. H. Turnquist,A. F. Bracciano A. D. Althouse. I have read it a couple of times and even shared with my family members. Really good. Couldnt put it down.