If the material in your book is somewhat general, but could apply to many, consider revising or adding information and publishing separate editions targeting these special markets. (toughnickel.com)
Any catalogs could easily come in separate editions for discounted titles and freebies. (chrismcmullen.com)
Therefore, you must create separate editions of your eBook for each vendor (e.g. a Kindle edition, a Nook edition, etc.) This process can be cumbersome, since when you want to update your eBook you have to make the same changes to multiple editions. (bbebooksthailand.com)