Kéthani

"The lives of all humankind, especially a group of friends, are transformed forever by the arrival of a mysterious alien race, the Kethani, that arrives on Earth bearing the extraordinary gift of immortality."@en
"The lives of all humankind, especially a group of friends, are transformed forever by the arrival of a mysterious alien race, the Kťhani, that arrives on Earth bearing the extraordinary gift of immortality and the implications of that gift on the future of the human race."
"It takes an alien race to show us what humanity truly is. This is the irony faced by a group of friends whose lives are changed forever when the mysterious alien race known as the Kethani come to Earth bearing an amazing gift: immortality."
"The alien Kéthani offer humanity the gift--or curse--of immortality."@en
"The alien Kéthani offer humanity the gift--or curse--of immortality."