Strange Aeons bundled together a trio of their books in order to serve your gaming needs better.
From the announcement:
A new bundle of the three in-print Strange Aeons rulebooks is now available. “The Bundle of the Beast” combines the Strange Aeons core rulebook, Morbid Adventures scenario compilation and Shocking Tales of Madness & Mayhem #3 at the devilish price of $66.66!
We’ve also tweaked our store settings to ensure the bundle ships for only $10 inside Canada or the US, or $18.50 elsewhere in the world (when ordered alone).