Wikipedia page about this book: https://en.wikipedia.org/wiki/The_Wailing_Asteroid

Release date is 2015-09-20

Produced by Greg Weeks, Mary Meehan and the Online
Distributed Proofreading Team at http://www.pgdp.net

"The Wailing Asteroid" by Murray Leinster is a science-fiction novel published in 1960. When mysterious radio signals from deep space match the haunting notes from engineer Joe Burke's recurring childhood dreams, he traces them to a distant asteroid. Building a spaceship with friends and family, Burke discovers an ancient fortress left by an unknown civilization—and learns that Earth faces imminent destruction from an implacable cosmic Enemy. Now humanity's survival depends on mastering alien weapons and technology within days. (This is an automatically generated summary.)

Original publication data not identified