Best way, assuming you want it available to bookstores and libraries, is to go to IngramSpark. You must buy an ISBN from Bowker ($250 for 10 is the most common purchase). There is a $49 setup fee, waived this month with the code INDIEFRINGE17
If you are in CreateSpace's "expanded distribution," I think you should de-select it and let IngramSpark publish a paperback as well. Their reach is far superior (and infinitely superior of course to KDP Print Gotcha). Amazon will mostly sell people the CS version but if there's a backlog of orders will source from IngramSpark as well or instead.
And do your hardcover at the same time. Amazon should stock that as well.
(Don't trust KDP to publish a print edition. Don't trust CreateSpace to publish an ebook.)