I have loved this whole series. However, a few of the books have leaned a bit too heavily on the architectural/music speak and the plots were a little hard to follow. 

Amongst Our Weapons is possibly my 2nd favourite of the series with the first book still standing as the only 5-star. 

There's more development of the team with a new "recruit", another female, and Lesley returns to stir things up. The plot is much more cosy mystery type with a serial killing "angel" from the Spanish inquisition on the loose. Meanwhile the looming birth of Peter and Beverley's twins add to the mayhem.