[screwballl]

This is a simple solution and therefore needs no further discussion.As the law states in laymen terms:

It is not illegal to remove DRM for personal and private use. The fair use exclusion of copyright law allows this. Courts have upheld this.

The DMCA states it is illegal to remove DRM for purpose of gain or damages, or on media that you do not have ownership of, which was also upheld by the courts.

Modification or removal of DRM for private use does not equal gain or damages as stated by the US courts.

Now for a library lent book, it is not your property so therefore illegal to remove DRM.