May 21, 2021 Remember to install the DeDRMplugin.zip instead of the DeDRMtools.zip. Then run Calibre, click 'Preference' 'Plugins' 'Load flugin from file' add the DeDRMplugin.zip file to Calibre. Follow the procedure and you'll find the DeDRM plugin has been added under the 'File Type' option. I have downloaded Calibre 4.23 on to a USB stick and also downloaded the most recent DeDRMplugin.zip (6.8.0) also onto the stick, and have tried to load the plugin to Calibre. However, after clicking ‘open’ after ‘Load plugin from file’ etc, nothing happens. Nor does it show up in the plugins. Unzip DeDRMtools7.2.1.zip and load DeDRMplugin.zip. Sign up for free to join this conversation on GitHub. Already have an account? Install the DeDRM plugin (instructions) To remove DRM on a rented book, the mobidedrm.py file in DeDRMplugin.zip needs to be edited, commenting out these lines: if val406!= 0: raise DrmException(u'Cannot decode library or rented ebooks.' ) Install KindleUnpack (instructions) Import the AZW4 file to Calibre.
because you bought it
Even though PDF is a horrible file format, it is well suited for textbooks since it can be opened virtually anywhere, often without needing additional software. Here are some ways to convert from proprietary, DRM-protected formats to PDF.
AZW4
Dedrm Plugin Zip Download
- Install Calibre
- Install the DeDRM plugin (instructions)
- To remove DRM on a rented book, the
mobidedrm.pyfile inDeDRM_plugin.zipneeds to be edited, commenting out these lines:
- To remove DRM on a rented book, the
- Install KindleUnpack (instructions)
- Import the AZW4 file to Calibre. The DeDRM plugin will automatically strip the DRM as it is imported. Then use the KindleUnpack plugin to convert to PDF.
Dedrm Plugin Zip
VBK
Dedrm_plugin.zip 6.8.0
As of 27 August 2017 it appears this no longer works because VitalSource is enforcing Bookshelf updates.
VitalSource Bookshelf needs to be installed, with the book to be cracked viewable in the Bookshelf program.
This program was my final resort in an exhaustive search, but sadly it stamped a huge red watermark on every page of the output PDF unless I bought it. After an investigation into the sorry state of PDF editors, I decided to edit the program itself. Luckily the author made a typo in the watermark ('Vitalsource' instead of 'VitalSource') and I was able to track down the string to line 236340 of the xxd dump of the vbkdrm.exe file. By replacing the string with null bytes, the watermark can be circumvented. The patched version is available here.
Note that this only works with an old version of Bookshelf.
Adobe Digital Editions
Dedrm Plugin Zip
Not much experience here; the only book I got through this seemed to only be a PDF, but allegedly DeDRM as mentioned above supports this as well.