Sherlock and Watson have been cordially invited to Buckingham Palace, for a meeting with the queen of England herself. Recognizing how inappropriate it would be to decline such an offer, Zack, Jillian, and the dogs head across the Atlantic to visit the United Kingdom. After Her Majesty has thanked them for their role in the recovery of several priceless artifacts, Jillian is shocked to learn her US Marine brother has been working with MI6, and is currently missing. Imploring Zack and the dogs to look into Joshua's disappearance, Zack soon discovers that Jillian's brother was working on a top secret project, and just about every foreign government wants to get their hands on him. Can Zack and the dogs figure out what Joshua has been working on? Will they be able to find him before someone else does? Will Zack be able to wrap this up in time so that he doesn't miss his own wedding? Readers are loving these indomitable dog sleuths. Meet Zack and the corgis, Sherlock and Watson, in this delightfully humorous series that pulls you right in.