I’ve read and reviewed the previous three books in the series

I would not recommend picking this up without having read any of the previous books. The crazy antics here make more sense when coupled with the equally crazy events of the last few times we met Tom Winscombe and the people associated with him (I do not take the chance to call them all friends). The complicated affiliations and the mania towards the need to know what possibly could be hidden in the long lost Vavasor papers also would make no sense if one encounters it for the first time here. Especially since it begins at just that point.
This time around, the trip takes our unlikely hero on a probable one-way trip to Minsk. He is taken by surprise every step of the way but still manages to come out alive. The very effort he takes to get back on his feet makes the story go on.
You have different gangs with their own personal reasons to be out for blood, and deeper controversies continue to be revealed during the course of the chases, attacks and numerous other violent incidents.
I really enjoyed the random characters wound up providing critical assistance, and there were many of them- quite a variety. Given how this one ended, I suspect another book is in the works, although I am not sure where it will pick up from.
I received an ARC thanks to NetGalley, the review is entirely based on my own reading experience of this book and the previous ones in the series.