Starplex by Robert J. Sawyer

In a universe where humanity has discovered a network of wormholes connecting distant galaxies, a diverse crew aboard a starship embarks on a mission to explore these cosmic pathways. As they encounter various alien species and face the challenges of interstellar diplomacy, they uncover a mystery that threatens the fabric of the universe itself. The crew must navigate complex relationships and confront existential questions about life, time, and the nature of reality, all while striving to prevent a cosmic catastrophe that could alter the course of existence.

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