For the visitors here who are perpetually tortured by the Damn! Where is the tip-jar button? question, less-evil twin has a time-travel book out. (It should be $3.99, but it says $5.99 at my link — which might be a Shanghai-effect.)
UF (2.1) plug here.
If you know anybody teetering on the brink of a psychotic episode, who just needs a slight nudge to plunge over the edge, it would make an ideal present.