A review by geethr75
Third Front by E. M. Hamill

adventurous dark emotional hopeful mysterious sad tense medium-paced
  • Plot- or character-driven? Character
  • Strong character development? Yes
  • Loveable characters? Yes
  • Diverse cast of characters? Yes
  • Flaws of characters a main focus? It's complicated

5.0

 
The final book of the series, this one has Dalí and the team of the Penumbra trying to chase down the drug runners of the Pilean Cartel in Sol Fed. Things go sideways when Dalí is identified as a Penumbra agent by a Pilean, and Sumner is relieved of his command following the fuck up with Alecto Sim. Dalí gets a message from Kiran Singh about a possible connection to Miriam Skadi, but for that, they will have to go to Luna where Dalí's family was killed. 
Dalí and Sumner go to Luna while the rest of the team arranges to extradite the Pliean assassin. In Luna, Dalí meets Mother England, the smuggler millionaire who is the money and face of The Third Front, the movement for Third Gender rights. Dalí reconnects with Dru who they rescued in the first book and who is now Mother England's PR person. Mother England has evidence against Skadi and a possible location where they will be but in return, they demand immunity. 
When Dalí and Sumner reach the rendezvous, it is to find a dead Kiran Singh and not a moment later, Homeland Security Forces show up. As they investigate, they realise that this goes beyond Miriam Skadi and the Luna terminal bombing since Skadi has managed to smuggle a highly advanced AI into Sol Fed. However, there is another AI that is sentient and hell bent on finding the kidnapped ones who decides to jack Sumner's body for a ride. 
This was another edge of the seats thriller with revelations and truths coming out that have cosmic implications. Dalí and Sumner get together (finally!) and the new AI Kitryd hitches a ride with Dalí as they run around trying to investigate without getting themselves killed. Alecto Sim makes a reappearance, and so does the Shontovians including Naru. Once again, Dalí has to try and save the day running against the clock and a broken ship that's literally heading to the sun. 
It was a good conclusion to the series, but there are still questions remaining, and I hope that the series will continue, even if only in novellas. 
If you love action packed sci fi with queer characters, alien civilisations and cultures, spaceships, and moral quandaries, you will love this book.