This is one of the books that I use when I have a grammar or punctuation questions. You’d think grammar and punctuation are straightforward, but they are not.
Another great book I would recommend is “Woe Is I” by Patricia T. O’Conner. It’s easy to use and has great information.
If you want a good laugh (yes, grammar and punctuation can be funny), read “Eats, Shoots and Leaves” by Lynne Truss
And for good online assistance, the Purdue OWL is the best!
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Strong writing—writing that moves, directs, and connects people—conveys thoughts and ideas with clarity and efficiency. Badly placed words create vagueness and…
Source: Forging Sentence Ties That Bind – Grammar and Punctuation