An interesting and thought provoking story set around the time of the Dreyfus trial. Vanessa Duncan is making something of a name for herself as a private investigator. Called in by a Professor of Kings College to solve a closed room mystery, she finds herself embroiled in anti-semitism, the Dreyfus case as well as mathematics! Professor Ralston dies in mysterious circumstances within a University library.The problem is that the only suspect left the building seconds before a shot rang out, and eye witnesses testify that no one else was in the building at the time. How did the killer escape - and who was it? As Vanessa investigates, it becomes clear that Professor Ralston was not exactly the pleasantest of characters and not exactly popular with his colleagues. Quite a lot of people would have liked to seen him dead.
Some interesting insights into the life of Victorian women - even how difficult it was for them to get lunch while out and about in London! The plot line is well worked out, and keeps you guessing. Characterisation is a bit thin at times, but this is balanced out by the strong story line.