I recently permanently deleted my book from the Kindle Cloud and/or Content Library. I searched online and this is the information I read on the issue.
Important: After you delete an item from Manage Your Content and Devices, you will no longer have access to re-download the item unless you purchase it again.
My question was, that since I have already paid for this book at some given point and yet have to repurchase it—will it be free the second time?
I could try it myself by repurchasing but did not want to charge myself and then hassle by requesting for a refund. Furthermore, knowing that you "own" these books even if a hacker maliciously deletes your Content Library would be comforting.
Since I have had a very good experience with the Amazon Customer Center, perhaps they'd give it for free regardless of stated policy.