Axis by Robert Charles Wilson

In a world transformed by the mysterious Hypotheticals, humanity grapples with the profound changes brought about by the opening of the Archway, a portal to a distant planet. As the remnants of Earth’s population venture into this new frontier, they encounter both awe-inspiring wonders and unforeseen dangers. Amidst this backdrop, a young woman named Lise is pursued by powerful forces due to her unique connection to the Hypotheticals. Her journey intertwines with that of Turk Findley, a man seeking redemption, as they navigate a landscape where the boundaries between human and alien blur, and the future of both worlds hangs in the balance.