There are many books that will tell you how to work the machines to make edits. Although Cut by Cut: Editing
Your Film or Video isn't tied to any one software, it thoroughly covers software and how to operate a digital system from dailies through delivery. However, machines don’t make edits. Editors make edits. This book will give you a place to explore the why. Why choose this shot and not that one? Why go from this angle to a closer angle? Editing is making tons of little decisions so that, in the end, it looks like no editing at all and lets the story shine through.
Available at bookstores, mwp.com and other online book sellers.