The Army has released Field Manual 4-0 as an audio book and a downloadable MP3 file.

FM 4-0, Sustainment, is the Army’s keystone document for sustainment in support of full spectrum operations. Sustainment encompasses all of the materiel, field services, human resources, health, religious and legal support required to support Army operations through mission completion.

To download the audio book, personnel must have Army Knowledge Online or Common Access Card credentials. The only way to obtain the audio book is online. There are no plans of distributing CDs.

To access and download FM 4-0 go to Click on FM 4-0 Sustainment (publication and audio book) on the scroll bar at the top of the page. The book is in MP3 format and will work on any device that plays MP3 files.