I was looking at Wayne Grudem's systematic theology and it appears you must purchase the disks as opposed to just downloading the book. Any reason, I thought Logos was making all the resources downloadable? Thanks!
http://www.logos.com/products/details/2067
Logos doesn't publish all the books that are available in its format. Grudem's systematic theology is put out by another publisher. They have chosen to limit resellers (which Logos is in this case) to a physical disc which Logos buys (presumably at a wholesale price) and then resells. Titles produced by Galaxie Software (e.g. Theological Journal Library) operate in the same way. The IVP Essential Collection is another example.
It would be nice if these publishing partners would allow Logos to add download options to these items...
EDIT: Most of Logos' catalog is available on the servers even if it can't be purchased as a download. Thus you wouldn't need to rely on the discs to get these resources on your computer after the license is activated. If you've been a Logos customer for a long time there might be some titles that Logos was contractually limited to distribute the files on physical media.
Kevin,
Thank you for the clarification!
This is another one that is available for download at the publishing partner's site but not from Logos. The caveat at the partner's site is that you must have Libronix installed for the download option to work.