Títulos / autor de séries de livros sobre civilização destruindo ondas que varrem a galáxia

Isso é quase positivamente "Os motores de Deus", de Jack McDevitt. A série é romances de 'The Academy' (Priscilla Hutchins).

[...] strange alien Monuments is discovered on Jupiter's moon Iapetus. Soon, others are found in several systems. And each monument is different; a large sculpture on Iapetus that archaeologist Richard Wald thinks is a self-portrait, mysterious square "moons" orbiting the first world found to have an intelligent (if pretechnological) civilization. But the most remarkable find is on the moon circling the world of Quraqua, a series of stone structures built to resemble nothing less than an entire city — but it was never a real city. The native Quraquat, themselves extinct, weren't the Monument-Makers, but explorations of their own ruins indicate that they did indeed come into contact with the strange species that inexplicably built this massive edifice, nicknamed "Oz" by its human discoverers, on their moon. Who were the Monument-Makers, why did they undertake these projects, and where are they now?]1