I couldn't put it down! In this book, humans have "uplifted" dolphins and the first starship, Streaker, crewed by humans and dolphins and commanded by a dolphin, have found possible proof of the Progenitors and the rest of the universe wants it at any cost. Great characters and story with intrigue, heroism, self-sacrifice, etc.
I really hope the next book explains just what it is that the Streaker found.
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