The Norton Field Guide to Writing

From the publisher's website:

"Flexible, easy to use, just enough detail—and now the number-one best seller.

With just enough detail — and color-coded links that send students to more detail if they need it — this is the rhetoric that tells students what they need to know and resists the temptation to tell them everything there is to know. Designed for easy reference — with menus, directories, and a combined glossary/index. The Third Edition has new chapters on academic writing, choosing genres, writing online, and choosing media, as well as new attention to multimodal writing.

The Norton Field Guide to Writing is available with a handbook, an anthology, or both — and all versions are now available as low-cost ebooks and in mobile-compatible formats for iPhones, Droids, and iPads."