For "fun" I'd start with Michael Lewis - Liar's Poker, The Big Short and Flash Boys are great, entertaining reads about life in and among the world of finance. It will NOT teach you the first thing about managing your money but it will go a long way towards demystifying the market and the people who make and destroy money for a living. The order presented is chronological, if it matters. Liar's Poker is like 25 years old by now so it's damn near historical. For education I'd start with this tiny, cheap, overview of a Kindle book. Do NOT take their specific investment advice; I built a fake portfolio of their recommended ETFs and it got killed. Then I backtested it for a year or two and it got killed harder. However, it's a really, really simple place to get a handle on it. For real education the good basics are A Random Walk Down Wall Street by Burton Malkiel and Charles Ellis' Winning the Loser's Game, both of which are pretty well ancient at this point but regularly updated. I'll be rinx has some suggestions, too.
Mostly just to +1 KB. Michael Lewis is a fun way to learn "if these guys have any chance they will rip me off and laugh while doing it" which I think is Wall Street rule #1. A Random Walk is really the book to read but it might be too dry. If you can't barrel through don't give up on finance, just switch to an easier book for a while. I started on The Bogleheads' Guide to Investing and can't hype that book enough. It's based on the principles of a random walk but written for less finance minded. It's one of the few kindle books I can lend so if you PM me your email I'm happy to lend it out. Once you're comfortable with the basics I really like anything by William J. Bernstein, maybe The Investor's Manifesto for a start. The Millionaire Next Door is an interesting bonus read, especially for parents.