Start gifting
Libro.fm for Business
Start a membership, get two free audiobooks
Almost ready!
In order to save audiobooks to your Wish List you must be signed in to your account.
Log in Create account
Shop the sale
In celebration of Independent Bookstore Day, shop our limited-time sale on bestselling audiobooks from April 22nd-28th. Don’t miss out—purchases support your local bookstore!
Shop nowHalo: Cryptum
This audiobook uses AI narration.
We’re taking steps to make sure AI narration is transparent.
Learn moreSummary
The first novel in the Forerunner Saga trilogy by science fiction legend Greg Bear—set in the Halo universe and based on the New York Times bestselling video game series!
One hundred thousand years ago, the galaxy was populated by a great variety of beings.
But one species—eons beyond all others in both technology and knowledge—achieved dominance.
They ruled in peace, but met opposition with quick and brutal effectiveness.
They were the Forerunners—the keepers of the Mantle of Responsibility, the next stage of life in the Universe’s Living Time.
And then they vanished.
This is their story.