RamistThomist
Puritanboard Clerk
It says Schilder Trilogy, but it is selling for $7, which makes me think it is just a single volume. That would still be a good deal, unless it's an abridgment of a Trilogy.
https://www.amazon.com/Schilder-Tri...qid=1505820093&sr=8-2&keywords=klaas+schilder
https://www.amazon.com/Schilder-Tri...qid=1505820093&sr=8-2&keywords=klaas+schilder