The Rowan (1990) is a science fiction novel by American writer Anne McCaffrey, the first book in "The Tower and the Hive" series (also known as "The Rowan" series). It is set in the universe of the "Pegasus" trilogy, against a backdrop of a technologically advanced society in which telepathy, psychokinesis and other psychic talents have become scientifically accepted and researched. Telekinetic and telepathic powers are used to communicate and teleport spaceships through space, thus avoiding the light barrier and allowing for the colonization of other planetary systems. In the series, psionic powers occur of varying strength, the possessors being ranked from T12 (the weakest) to T1 (the strongest). The very strongest are employed as "T1 Primes" by an independent company, FT&T, (Federated Telepaths and Teleporters) for teleporting cargo and passengers between the systems. Source: Wikipedia (en)