LTW told Harry what to do via his connection to Demonreach. The Gatekeeper was the one who clued them in to Harry's bond with the island. That's why LTW was up there and saw Harry fighting with the Skinwalker. LTW and Ancient Mai were acting as rear guard while Harry, Ebenezar, and his impromptu strike force battled the Grey Men...

Are there any threads concerning the fact(?) that Harry was supposed to die in Dead Beat and would have if Marcone (Ms. Gard) hadn't saved him?

Roger...thanks...I'm re-reading Small Favor now...I know Sanya and Shiro were both descended from Royalty...I don't remember if Michael knew he was...or if they were going to research it...if it was a pre-requisite to being chosen as a Knight then I wanted Murphy to be descended from Royalty because I wanted her to be the wielder of the Sword of Faith (probably not going to happen now)...but now Butters is a Knight...so is he also a descendant of Royalty?