Quite dull. I only managed half of it, mostly due to the proliferation of pointless sentences. Some authors in the 'A Very Short Introduction' series manage to exploit the difficult format very well, usually by restricting themselves to a small subset of their topic, allowing them to go into sufficient detail to interest the reader with concrete examples and vivid descriptions etc. While Fraser does often get to the details, he is forced into quite dry and uninformative prose - frequently resorting to tables of uninteresting information - as he tries to cover too much ground.
For example, forensic chemistry gets the following brief treatment: "A large number of analytical techniques is used to identify the diverse range of substances encountered in forensic chemistry. The particular method used will depend on the nature of the substance involved, whether it is organic or inorganic, solid or liquid, or present in trace quantities or large amounts." What does the author hope the reader, after reading these two superficial sentences, now knows about forensic chemistry that they could not have already guessed?
A further annoyance is the superfluous introductory and concluding remarks of chapters, outlining and then reviewing their content - unnecessary for a book of just over 100 pages and rather tedious.
More amusing is the choice of pictures, which includes two shoe marks (in sand and concrete, just to be sure), and an Asda receipt put back together after being torn in two. Others were more interesting, but these three were exactly as insightful as you might expect.
Overall, a rather tedious book that I wouldn't recommend.