Series
There are 3 books in the Across the Universe series.
Amy is cryogenically frozen for a 300-year journey to a new planet, but someone wakes her fifty years early, leaving her trapped on the generation ship Godspeed. As she and the ship-born Elder uncover dark secrets about the vessel's authoritarian society and mission, they race to prevent disaster. A
All 3 books total 1,172 pages.
The Books Oracle — track the series you are partway through, and see what to read next.