Reddit mentions: The best business encyclopedias

The Elements of Style is the classic reference and I've probably read it over a dozen times, but it has seen a pretty big backlash and it does contradict itself in some humorous ways. I'd recommend Style: Ten Lessons In Clarity And Grace by Joesph M. Williams. I found it much more clear and sensible than TEOS. In addition, I'm a big fan of Garner's Modern American Usage, not as a book on grammar but as a reference for use during composition. For what it's worth, I got both of these recommendations from professional editor John McIntyre. (But TEOS has Stephen King's blessing, so there's that as well.) Those and King's On Writing are the only writing books I've ever been able to stomach.

Style: Lessons in Clarity and Grace. (If it's too pricey, get an older edition, or get it second-hand.)

Read this book to learn how to write effectively, as opposed to grammatically correctly. Based on your post, your grasp of grammar looks fine.

Knowing the rules of grammar and punctuation won't make you a good writer any more than knowing the rules of chess will make you a good chess player. (And, just like in chess, the rules obviously still matter.)

My professors have used and recommended Style: Lessons in Clarity and Grace. I've found it pretty useful!

I recommend this book. It came recommended by a professor and I have found it very useful for my own writing.

Style: Lessons in Clarity and Grace

I like this book. If I remember correctly, it is somewhat light on formal grammar, as it is a style guide, but it offers many useful structural tips that help make grammar errors less likely.

Edit: I should mention, there aren't many practical exercises in recent editions, though you can easily make your own from what the guide is telling you by applying them to your own writing, news papers, etc.

For word usage and writing style issues, I'd highly recommend the book Style: Ten Lessons in Clarity and Grace by Joseph M. Williams. Here's the US version: http://www.amazon.com/Style-Lessons-Clarity-Grace-Edition/dp/0321898680

And I second the tip below to read things out loud to yourself!

DONT GET THIS ONE: http://www.amazon.com/Elements-Style-Illustrated-William-Strunk/dp/0143112724/ref=sr_1_1?s=books&ie=UTF8&qid=1451791859&sr=1-1&keywords=elements+of+style+illustrated+by+kalman

This is the most popular illustrated one on Amazon. I don't know why it's so popular. A few reviewers point out that it's the wrong version, and if you click "look inside," the book will in fact reveal itself to be a piece of crap.

I bought my GOOD copy at a bookstore so good luck online. I think this one is right, but don't take my word for it.

The illustrations are basically funny and whimsical paintings of some of the example sentences. They aren't hugely helpful but I think it's worth getting the illustrated one anyway.

I quite like http://www.amazon.com/gp/aw/d/0321479351/ref=redir_mdp_mobile/177-8397041-0253425
Also for poetry, Turco's Book of Forms is great.

If you're looking for a grammar guide, check out The Elements of Style by William Strunk Jr. and E.B. White. I found that my grammar improved significantly after reading this little book.

Maybe it's been changed in the updated version? I have the illustrated Elements of Style, as seen here, and rule 17 says to omit needless words!

Random, but I found the book that helped me a lot. Here's an amazon link.

start reading

https://www.amazon.com/Sentence-Correction-Strategy-Manhattan-Preparation/dp/1935707671