Mission: Improper is a fantastic start to a new spin off series by Bec McMaster, London Steampunk: The Blue Blood Conspiracy. Steam/industrial Victorian London, three years after the revolution. Blue bloods, verwulfens, mechs, and humans are adjusting to a new way of life. And now the work of the revolution is at stake. People are missing, secret societies, and reformation to return to the old ways, things are getting messy. And only one discreet team has the authority to figure out who or what is behind these calculated attacks. 
 With the characters returning from the London Steampunk series, Caleb Byrnes--stoic Nighhawk and Ingrid Miller--feisty verwulfen take center stage. Struggling to find a health balance in their otherwise unstable 'relationship' are put to the test and challenged until the very end. But some things are worth fighting for... 
 Both Byrnes and Miller are paired up together, along with Charlie, Ava, Gemma, and Kincade, under the ever watchful eye of the Duke of Malloryn. It seems not all of society is happy in the post-revolution era ruled by the Queen, especially specific members of the Echelon. With a mystery to solve and feelings to define, Mission: Improper dives into the undergrounds of London. 
 Readers be warned, I suggest the best way to approach this series is to start off with the London Steampunk series, as it will provide the background to fully understand what is happening. I recommend this book for all those who enjoy a good mystery paranormal romance with a splash of steampunk. Mission: Improper was provided by the author for an honest review. 4.5/5