Yes, Calibre will covert EPUB to Mobi, which is the format Kindle uses. I'm not sure about the process to convert a library book though, as I've not tried that. When I've converted EPUB formatted books I have in my Apple "books" folder, I move the book to my desktop, right click on it, and choose ":open in Calibre". From there the coverting process is fairly straightforward. (Task bar at the top of the app) To load it to my Kindle I use Calibre again, but then plug my Kindle in to my MacBook. When Calibre recognizes the Kindle, send the Mobi format to your Kindle.

If your books are in a "download folder", the the same process applies, except you won't need to move the book to the desktop to open it in Calibre.

Hope this helps!

Sorry to bare my ignorance but- these are the few books that say they are in overdrive and I can "Read in your browser". I don't see where they are actually on my computer ? Also, my chromebook has no usb ports and I see some of the tutorials say to transfer that way.

I am trying but I think I am more challenged.

(As I said, I am able most of the time to get the library book in kindle format and read on my kindle no problem. And, I am able to get the "not available in kindle" to read on my chromebook. I am really grateful for that but was wondering if I could have my cake and eat it and not gain weight so to speak.

:)

LOL salonva--I'd like that, too!

Maybe it's not possible to covert library books. I've had pretty good luck getting Kindle format from our library. Sorry.....

Books I download from the library in a readable form are DRM:

Digital rights management (DRM) is a systematic approach to copyright protection for digital media. The purpose of DRM is to prevent unauthorized redistribution of digital media and restrict the ways consumers can copy content they've purchased.

I cannot convert those in Calibre. Some books I've received from other sources, I can convert.

Do you have Calibri downloaded on a computer or laptop? Are the books already epub? I only know how to get books on Kindle using Calibri.

I started to download Calibre (Caliber? Calibri?) but I am totally baffled as to what I trying to do. I think ALL the books I borrow from the library are through OVERDRIVE, and a small bunch of them are not available in the kindle version. So it's still OVERDRIVE but it seems from my very limited understanding that those "books" are accessible by me only via the web so I don't know where to find them to try to move them to my kindle.

I saw some guidance about emailing them to the kindle which I think is what I did for the project gutenberg books ( to the email at myname@kindle .com) but I do not know where there other temporarily borrowed books "reside" in the interim.

I think I will just be thankful that I can read them at all.

I appreciate the suggestions but I think @donna_loomis may be onto something and these are not doable.

If you downloaded an epub book and you installed Calibri then you can convert it to Mobi. You would also need a kindle email through Amazon. (Example...janedoe@kindle.com) which you should have created when you got Kindle.

It's a process but once your set up you can keep any epub book and read when you want.