Small in size and short in length, this is a quick read in terms of pace and reading time. It opens with our two protagonists on an early-morning train journey in south London spotting a human heart sliding down a glass rooftop. They both set out, the book generally switching from one character to the other between chapters, to find out the truth behind this grisly sighting and are soon tangling with both the police and the staff of Guy's Hospital, especially the sinisterly nicknamed lecturer of the title, whilst simultaneously trying to rebuild their lives after the breakdown of their relationship.
As a book it is thoroughly entertaining nonsense. One character becomes a porter at the hospital in the blink of an eye; the protagonists see an object sliding down a glass roof and immediately know it is a human heart despite being on a moving train; we're told in some detail about the improvised music scene; someone is pushed into a mortuary locker to keep them trapped but without being searched first, so they have a phone so can call for help; and the final reasoning is frankly a little daft... but still it kept me turning the pages, and after a few hours I'd finished it.
All in all it's an entertaining read but nothing really new. A fun, undemanding read.