Get Calibre for the Kindle.
Get this Kindle plugin zip file.
Unzip the file, Open Calibre>Preferences>Plugins>From File>Unziplocation/Calibre_Plugins/K4MobiDeDRM_v04.5_plugin.zip
Choose the zip file K4MobiDeDRM_v04.5_plugin.zip
Customize plugin>Enter the Amazon Serial No
The serial no is located from Kindle>Home>Settings>Device Info>Serial No “B00E-” (example)
Hit Ok, close and restart Calibre.
The DRM is removed while importing the book to Calibre. So if you’ve already added the book, delete it from Calibre and readd it.
Joel G Mathew, known in tech circles by the pseudonym Droidzone, is an opensource and programming enthusiast.
He is a full stack developer, whose favorite languages are currently Python and Vue.js. He is also fluent in Javascript, Flutter/Dart, Perl, PHP, SQL, C and bash shell scripting. He loves Linux, and can often be found tinkering with linux kernel code, and source code for GNU applications. He used to be an active developer on XDA forums, and his tinkered ROMS used to be very popular in the early 2000s.
His favorite pastime is grappling with GNU compilers, discovering newer Linux secrets, writing scripts, hacking roms, and programs (nothing illegal), reading, blogging. and testing out the latest gadgets.
When away from the tech world, Dr Joel G. Mathew is a practising ENT Surgeon, busy with surgeries and clinical practise.