This program only works with iTunes v12.0.1 or before.

More information: https://www.tuneskit.com/audiobook-converter-win.html

Audiobook Converter for Windows
Best audiobook DRM removal solution for Windows to remove DRM from iTunes and Audible audiobooks while converting DRM-ed M4B, M4A, AA, AAX audiobooks to unprotected MP3, AAC, M4A, WAV, FLAC.

Easily bypass DRM from protected iTunes and Audible audiobooks
Audiobooks sold on iTunes and Audible.com are all protected by DRM policy and can only be played on selected media devices. In order to play the DRM-ed iTunes and Audible audiobooks on any devices, a third-party audiobook DRM removal tool will be needed to get rid of the DRM. TunesKit DRM Audiobook Converter for Windows is such a professional audiobook DRM remover which can help you remove DRM from the locked audiobooks on iTunes and Audible.com with ease.

Convert DRM M4B, M4A, AA, AAX audiobooks to non-DRM MP3, AAC, M4A, WAV, and FLAC
With the help of TunesKit DRM Audiobook Converter, you can easily convert any DRM-protected audiobooks, including M4B, M4A, AA, AAX to DRM-free audio formats, like MP3, AAC, WAV, M4A and FLAC that are supported by most popular media playing devices, such as iPod, PSP, Zune, Creative Zen, Sony Walkman, iRiver, etc and other mobile phones or tablets.

Encode DRM-ed audiobooks at 30X faster speed with original ID3 tags fully preserved
By applying an unique sound recording technique, TunesKit Audiobook Converter for Windows is able to work at 30x faster speed in converting a DRMed audiobook to unprotected formats, which means a 30-minute long auduiobook could be converted within 1 minute only. What's more, this smart audiobook DRM remover will also keep the original ID3 tags when you convert a DRM-locked audiobook to MP3 or AAC format