They had volunteered to participate in a marine biology study run by the University of California at Santa Barbara to learn more about the movements and habits of great white sharks. The work of tagging them had been going on for years, but it had met with only limited success because most sharks that had been tagged were never seen again. Keeping track of individual great whites presented many difficulties. They were reputed to travel vast distances, they were very difficult to capture, and they were dangerous. But Isla Guadaloupe seemed to offer a special chance. It was a place where very large, mature great whites reliably appeared year after year. And if members of an expedition were willing to get in the water inside a shark cage, it might be possible to tag them without attempting a capture. Sam used his satellite phone to report the tag number and description of today’s shark.

As the boat moved along easily on the open water toward Baja California, Remi let the wind blow through her long auburn hair to dry it. Sam leaned close to her. “Still having fun?”

“Sure,” she said. “We always have fun together.”

“That’s not what you were thinking. Something’s bothering you.”

“To tell you the truth, I was thinking about our house,” she said.

“Sorry,” he said. “I thought spending some time away on a research project would help the time go faster. I figured you were getting tired of the repairs and remodeling.”

A few months ago, they had returned from the excavation of hoards of plunder hidden in crypts across Europe by the Huns during the fifth century. Three rival treasure seekers either believed that the Fargos had taken some of the valuable artifacts home with them or they simply wanted to take revenge on the Fargos for beating them to the treasure. They had mounted an armed attack on the Fargos’ four-story house on Goldfish Point in La Jolla and battered it to pieces. Since then, the Fargos had been overseeing the repairs and rebuilding.

“I was tired of it,” she said. “Contractors were driving me nuts. First, you have to go with them to the plumbing showroom to pick out exactly the fixtures you want. Then you need a meeting to hear that they’ve stopped manufacturing that model and you have to pick out another one. Then—”

“I know,” he said, and threw up his hands.

“I hate the repairs, but I miss our dog.”

“Zoltán’s fine. Selma is treating him like king of the pack.” He paused. “When we started this trip over a month ago, they were hoping we’d be able to tag ten sharks. That big guy we just got is number fifteen. I guess it’s time to hang up our tagger and head back.”