I just finished How Finance Works: The HBR Guide to Thinking Smart About the Numbers, by Mihir Desai.
This is based on finance course taught by a Harvard Business School professor (that does sound funny – just repeating the blurb here).
This covers a general view of capital markets, how companies allocate their capital, how to value is created, and how to fund companies.
I have actually had a lot of this in more complete courses in the MBA I am doing online (Saint Paul/LIT), but I have to say that the coverage here was quite excellent, with a nice amount of quizzes and examples.
And all of that in a relatively short book.
I read this one on O'Reilly Learning, which I usually like a lot. It had to be on the PC browser, as the android app decided to not load some of the images (unfortunately this happens sometimes)…
Overall, strongly recommended.