Graham Walmsley really knows how to take classic Lovecraftian tropes to create original and yet very "authentic" Trail of Cthulhu scenarios. The Rending Box is another investigation designed for Purist-mode adventure which highlights the horror of the setting and really pushes the characters to the edge of sanity. As such it makes a perfect one-shot adventure, and like all of Walmsley's ToC scenarios is simply a lot of fun to play if you're a fan of Lovecraft's stories and don't mind the likely outcome that their characters are unlikely to come out of the adventure unscathed. I would highly recommend this and the other adventures by Walmsley.
[5 of 5 Stars!]