This is the sequel to The Weirdstone of Brisingamen, reviewed on 16 July. It carries on directly from the earlier story, concerning two children in Cheshire and their inadvertent adventures in a magical underworld with wizards, elves, gnomes and other more ominous beings.
It is very much a direct sequel – Garner assumes that readers would have read the earlier book, as the story plunges straight into the action without any of the introductory scene-setting which occurred in Weirdstone. It might be therefore regarded as a 'part 2' of that story. The pace is rather frantic, with one crisis following rapidly after the last, and as well as the familiar characters from Weirdstone, quite a few new ones are added. As he explains in an end note, he has researched the obscurer aspects of Celtic mythology and populated the book with creatures from there. The problem is that new creatures keep appearing in the book with little in the way of introduction or explanation.
On the whole, I felt that Gomrath lacks the charm which made Weirdstone such a success. It has a rushed feel to it, with little build-up of the characters or the plot. Those who loved Weirdstone will enjoy the book, but I found it a dispensable addendum to the earlier work.