For 24 hours, TSW is a cool $14.99 (or 14.99 euros) on Steam. Got that? Only 24 hours... and already counting down. So if you want to take advantage of this deal and get full access to everything up through Issue #4, there's no time for hemming or hawing about this deal; it goes the way of the dodo at 1:00 p.m. EDT tomorrow, June 20th.
[Thanks to Balsbigbrother1 for the tip!]