The Gathering Dark

The Gathering Dark is book 8 in the Inspector McLean series, and is by far the darkest in the series.
A lorry bearing a tanker of aggregate waste, crashes into a crowded bus stop whereupon the tanker splits and spills its toxic load. Tony is witness to the carnage, and ends up leading the investigation into the circumstances of the crash.
In separate incidents, people with tenuous connections to the waste company responsible for filling the tanker, are dying of fright. Who, or what, is scaring them to death?
Madame Rose makes a welcome return. The feline army also return, and we all know what that means.
The ending is quite sad, and I can't help but wonder what the future has in store for Tony on a personal level. The guy deserves some luck and happiness, methinks.
The Gathering Dark is a dark and gritty read, just the way I like my crime thrillers. It is my favourite book in the series to date.