The Last Protector is the latest addition to Andrew Taylor’s wonderful Marwood and Lovett series set in England during the Restoration. It’s now 1668, and Charles II, restored to his throne eight years earlier, is beginning to lose the support of the people due to the extravagance of his lifestyle and the immoral behaviour of his courtiers. Many are starting to long for the days of the Lord Protector Oliver Cromwell and his son, Richard – and when Richard returns (in disguise) from exile, he becomes the centre of a conspiracy into which James Marwood and Cat Lovett are drawn.

At the beginning of the novel, government agent Marwood, still working for Joseph Williamson, Under-Secretary of State to Lord Arlington, is sent to spy on a duel between Lord Shrewsbury and the Duke of Buckingham, who is believed to be plotting against the king. Unfortunately, Marwood is seen by Buckingham’s men, making him a target of the Duke. Meanwhile, Cat, now married to the elderly architect Simon Hakesby (and not really enjoying the experience) has a chance encounter with a young woman she hasn’t seen for years. The woman’s name is Elizabeth Cromwell, the daughter of Richard, the last Protector. Richard has become caught up in Buckingham’s plans to gain power and he wants Cat and Simon to help him. In this way, Cat and Marwood are both pulled, via different routes, into the same circle of events and their two separate storylines become entwined.

This is the fourth book in the series and I would recommend reading them all in order if you can (the previous books are The Ashes of London, The Fire Court and The King’s Evil). It’s not really essential as the novels do all stand alone to a certain extent, but Marwood and Cat have a complex relationship and I think it’s best to follow their stories from the beginning. They don’t seem to have as many opportunities to interact in this book as they do in the earlier ones, but the occasions when their paths do cross are always worth looking forward to.

As usual, there’s also an interesting collection of secondary characters to get to know. One of the many things I enjoy about this series is the way the books incorporate both the lives of the nobility and the lower classes and there are two characters in particular who stand out this time: Ferrus, the ‘mazer-scourer’, a tall, skinny man whose job it is to squeeze himself down sewers to clear blockages underground, and Chloris, a kind-hearted prostitute who does her best to help Marwood despite her humble position in life.

Compared with the previous three novels, this book is more of a thriller than a mystery, still with plenty of twists and turns to the plot. And of course, the atmosphere and attention to detail are excellent, bringing to life the London of the period as the city continues to rebuild following the Great Fire of 1666. I hope there’s going to be a fifth book, especially as there’s a certain development towards the end of this one that has left me wondering what the future might hold for Cat and Marwood.

Thanks to HarperCollins for providing a copy of this book for review via NetGalley.