A Fire Upon the Deep - Epilogues (Vernor Vinge) 

"A Fire Upon the Deep" by Vernor Vinge
Epilogues
Genre: Science-fiction
Year: 1992
Synopsis:
An expedition from Straumli Realm, an ambitious young human civilization in the high Beyond, investigates a five-billion-year-old data archive in the low Transcend that offers the possibility of unimaginable riches. The expedition's facility, High Lab, is gradually compromised by a dormant superintelligence within the archive later known as the Blight. However, shortly before the Blight's final "flowering", two self-aware entities created similarly to the Blight plot to aid the humans before the Blight can escape.