Here are a few of the top-rated publishers for ebooks, paperbacks, and audiobooks. Contact them for more details.
BOWKER IDENTIFIER SERVICES
Always purchase your own ISBN numbers (International Standard Book Number) to supply to the publishing company. Each format of a published book — print or ebook — and every new edition of a book needs its own ISBN number. It can be more economical to buy Bowker’s package of 10 ISBNs; they never expire.
This company gives you access to the world’s largest network of audiobook sellers and everything you need to create professional audiobooks. Sell your audiobook from 40+ partners, and keep 80% of the royalties on every sale. The listening world you’ll access here includes their retail and library partners ranging from major global brands to new startups.