At Bookshop.org (buy from Indie bookstores)
At Amazon (pending)
Professional Editing Organizations
Editorial Freelancers Association (US)
Society for Editors and Proofreaders (UK)
Institute of Professional Editors (Australia)
Editors’ Association of Canada
Protecting Yourself from Scams
The Independent Book Publishers Association guidelines for hybrid presses.
Search agent and publisher names on the Absolute Write author forums.
Writer Beware! Blogs details warning signs of bad-faith agents and publishers
SFWA's list of what to watch out for when approached by a publisher.
Jane Friedman’s The Business of Being a Writer for a greater understanding of the industry.
Writers Digest has lists of agents. Like this one.
Publishers Marketplace shows which agents are selling in your genre
#10queries agent discussions on Twitter
#tenqueries agent discussions on Twitter
Jessica Abel’s work on Idea Debt
Useful Apps & Websites
Fictionary guides authors through a big-picture self-edit of their book.
Hemingway analyzes text for readability.
PerfectIt! manuscript cleaning software designed for professional editors.
Scrivener is a word-processing program designed specifically to write books.
Purdue OWL reliably and understandably explains grammar, punctuation, and mechanics.
Grammar Girl website/podcast has explanations of rules both simple and complex.
The Chicago Manual of Style grammar and punctuation rules for editors working in that style.
Merriam-Webster is the go-to dictionary.