It's Spring sale time at GOG and their first giveaway is Book of Demons

GOG Store Page Link[www.gog.com]
(claim from banner on front page)

Details:
- Account required: GOG with e-mail marketing opt-in
- DRM-Free (NOT Steam)
- Offer good thru March 25, 1400 GMT
- Steam store page for evaluation.

LH
The book is always better than the movie