Book 1 of the Lightspeed Trilogy

Really enjoyed this trilogy. It reminds me somewhat of The Expanse, but the story is somewhat less convoluted and follows fewer characters. The plot revolves around the invention of faster-than-light travel, which gets independently discovered by at least four different people at different times, and has some peculiar side effects on time. It's also got a very interesting theme of panspermia with our solar system as the source template for life, spread onto many planets by an enigmatic entity billions of years old.