What unites the members of the party as they prepare to cross to the island in and then there were none?

In Agatha Christie's "And Then There Were None," the members of the party are united by a shared sense of intrigue and anticipation about their invitation to the isolated island. Each individual believes they are being summoned for different reasons, such as a vacation or a job opportunity, but they are all intrigued by the mystery surrounding their host, Mr. U.N. Owen. As they prepare to cross to the island, they are also bound by an underlying tension, as they sense that something ominous may be at play, setting the stage for the unfolding drama. This sense of curiOSity and the unspoken fear of the unknown creates a precarious bond among them.