Having just finished the first Quarry - I read this in one sitting.
Quarry is a contract killer who ends up a bit on the lonely side with contract killers coming after him!
Mr Collins weaves a powerful, interesting and dramatic story involving his lead character. It may be hard to like a contract killer who makes no excuses for his job but you end up liking him none the less. There is much humour and irony in Mr Collins writing and neither he or Quarry take themselves to seriously. There are lots of twists and turns but it is the his quality to absorb you that is his greatest strength.
Mr Collins does not seem well known in the UK - but he should be and I'll do my best to help!