I read the first two books of this series (The Case of the Missing Moonstone and The Case of the Girl in Grey) earlier this year and enjoyed them both. So when I found digital versions of the third and fourth books, I downloaded them immediately and plunged in. The third book in the series (The Case of the Counterfeit Criminals) continues the adventures of Our Tween Heroines (tm) as they unravel yet another case. This time, a kidnapped dog is being held for ransom: the owner (another young girl, this one an archeologist) must authenticate a clearly inauthentic ichthyosaur skeleton for the British Museum or risk never seeing her beloved terrier again. And this time, Our Young Heroines (tm) must face the complication that Lady Ada’s overbearing grandmother has come to visit and is Displeased with her granddaughter’s companions and “hobbies.” As with the previous books, the writing is on the simple side, but delightful. I enjoy that there’s continuity and callbacks from the previous books, and I’m especially enjoying the developing rivalry between Ada’s Sherlock and Nora Radel’s Moriarty. Definitely looking forward to book 4!