This was a thrilling book. Since it dealt with writers, I found it all the more interesting. It did tend to get a bit melodramatic though. That’s when the author would insert Malcolm’s deranged mother, for comic relief.
I also found the resolution extremely improbable. SPOILER ALERT- It seemed like everyone conceivable could have committed the crime. Sure, surprise the reader, but then you risk an unwilling collapse of disbelief.
That’s my two bits.