Add eBook to Kindle From Your PC

After downloading a MOBI file, there are three ways to add it to your Kindle library. I suggest that you first try to use Amazon’s Send to Kindle desktop app. If that doesn’t work, you can send files to your Kindle using your email or transfer the file with a USB cord.

If that doesn’t work, the Internet is your friend.  There are several help webpages and online videos that show step by step instructions.