Just play more no need spending money also you can learn from pros via youtube
lol imagine thinking 1200 to 1400 is decent
"Attacking Chess" by Josh Waitzkin, is in your price range.
It's a coincidence, I don't really read Chess literature, I barely have the motivation to solve chess problems from time to time, it's just that I read this one back when I was really enjoying playing chess a lot and tried to improve.
It's an OK book for beginners I think, although not specifically aimed at blitz, I'm sure you'll be able to find specialized literature on blitz.
Don't waste your money when you can get all you need for free on the internet. Just youtube opening and defense tactics. If you get good enough for tournament level, then invest some money, until then just keep an eye out for tactics on the internet.
1. Learn more about Endgames
2. Avoid learning too many openings, stick to very few
Books- #1 related books
Watch agadmator on youtube
People are actually trying to get good at chess ? May I ask why ?