David Mack 
Star Trek: Picard: Firewall [EPUB ebook] 

A thrilling prequel adventure based on the acclaimed TV series Star Trek: Picard!Two years after the USS Voyager’s return from the Delta Quadrant, Seven of Nine finds herself rejected for a position in Starfleet and instead finds a new home with the interstellar rogue law enforcement corps known as the Fenris Rangers. The Rangers seem like an ideal fit for Sevenbut to embrace this new destiny, she must leave behind all she’s ever known, and risk losing the most important thing in her life: her friendship with Admiral Kathryn Janeway.