This is a typical Goddard.
Very easy to read, hard to put down, but as usual leaves you vaguely unsatisfied.
I have had this feeling with all of his books I have read (must be at least six or eight).
They are beautifully researched, skillfully written and the plotting is obviously something Goddard prides himself on (perhaps too much so), the atmosphere is always well rendered and you read and you read and you don't sleep and you are late to work and spend hours on the loo, and you get to the end usually in about 36 hours, and think hmm well, ok
I would always recommend Goddard to non-Goddarders, as well worth reading but I wouldn't wax quite as lyrical as some of your other reviewers.