If you’re looking for one comprehensive guide that covers all the essentials of professional typography, check out
Donny Truong’s free eBook. It leads you step by step through the craft of making informed typographic choices, shaping your attention for detail and providing you with the technical background you need to gain full control of your typography. The eBook is free, but if you find it useful, be fair and consider paying for it. The price is up to you.
Thanks Cosima and Smashing Magazine.