I'm not a Martin and Mangels fan so I couldn't get into the first two books of the Titan series, but the third one Orion's Hounds is great and definitely deals with new life/civilizations, and you don't need to know anything about the series to get into it. And if you like the book, there are three(?) others after it in the series. Orion's Hounds deals with space-born lifeforms "cosmozoans", Over a Torrent Sea about the ecosystem of a totally water-covered planet, and Synthesis about artificial intelligence.
I read only Hounds, but its exploration of space-born life felt like a natural extension of the universe presented in the series - Michelangelo's line about the statue always having been there under the marble and his job only to chisel out the extra bits.
I read only Hounds, but its exploration of space-born life felt like a natural extension of the universe presented in the series - Michelangelo's line about the statue always having been there under the marble and his job only to chisel out the extra bits.