Berserker Kill

An ancient berserker, a gigantic space going killer machine programmed to destroy all life, seizes a space laboratory devoted to preserving a vast number of human zygotes. The zygotes are being stored for retrieval and growth in a future colonization project. Captain Dirac Sardou, whose wife and zygote were on the space vehicle, is obsessed with pursuit of the berserker. During the chase, mysteriously the laboratory, Captain Sardou’s ship, and the berserker disappear.
Three hundred years after the disappearance, evidence of the missing vehicles and the damaged berserker is found.
The would be rescuers are confounded. Why didn’t the berserker destroy the Captain’s ship? Why hasn’t the berserker destroyed the vessel filled with nascent life?
A fast paced space adventure.