Heading to Scotland on the Caledonian Sleeper, Jenny Bowen encounters a stressed woman and a girl she assumes is her daughter. Not giving them a second thought, she locates her compartment only to wake during the night and find the body of the woman, seemingly the victim of an overdose. After speaking to the police, Jenny realises that there is a bigger mystery – where is the young girl? With no CCTV footage of her entering the train, she finds the authorities reluctant to believe her story. Jenny knows, though, what she saw and she will not rest until she knows exactly what happened on the train.

What She Saw Last Night has been on my radar ever since hearing the author mention it on the Two Crimewriters and a Microphone podcast. As a huge fan of Hitchcock’s The Lady Vanishes, which tells the story of a woman who seemingly goes missing on a train, my interest was definitely piqued and I could not wait to read it.

The book starts off with a great mystery that really gets you thinking. We know that Jenny has seen the woman and the child on the train, but why is there no CCTV footage showing them either entering or exiting the train? I really felt for Jenny as she knows exactly what she saw, but with no one to believe her, you could forgive her for beginning to doubt herself. I was pleased that she found an ally in Mike, one of the detectives on the case, who realised that there may be something to her story, despite his superiors being keen to draw a line under it.

Once Jenny starts her own investigation, we see the story take a dramatic turn as she finds herself in grave danger due to what she uncovers. There were times when I wanted to shake her due to the reckless nature of some of her actions, but, conversely, times when I applauded her bravery and determination to find out what had happened to the little girl. We find the plot becoming like a cat and mouse chase as Jenny soon finds herself fleeing from someone she has met previously. There were several heart in mouth moments as we see her racing through the streets and Underground of London, desperately trying to evade a particularly nasty killer.

One event in particular made me gasp, and I had to put the book down for a while while I came to terms with what I had just read. Although shocking, this was a great twist, and something that I definitely did not see coming.

What She Saw Last Night is a fast-paced, exciting read with numerous twists and turns to keep the reader on the edge of their seat. I thoroughly enjoyed it.

With thanks to Orion and Net Galley for my copy.