should be fine on a small screen
The question is what reader are you using. Taking the amazon kindle software android/iphone for example, it is capable of reading the mobipocket (.mobi) format provided on the later dvds or all new free/paid versions. If it is one of the older cd disks at thefifthimperium then the pdb/prc format may not work. In which case it is i) probably available on the the baen ebooks website in .mobi format or ii) send it to your kindle email account and they will convert it to the kindle .azw format and deliver it to your devices. Bare in mind the mobipocket format predates the kindle. I used to read them on a little palm pilot with a 160x160 matrix screen with no problems, you just need to change the display font if necessary.
