Kirjahaku

Terran man befriends 2 people from another world and is invited to visit them on their world. While there, he develops a close relationship with a juvenile member of an ancient alien race who is not even remotely human, physically, but has a very human personality. Together, the two of them provide a valuable service to their hosts that ends with the Terran being hired to work as an Explorer for the other world. That job leads to an unending series of adventures and priceless friendships.

Girl born on Terra grows up on another world and becomes the top expert in communication with other humans, strange aliens and intelligent animals. In a symbiotic relationship with an equally young alien composed of nothing but energy, she must avoid assassins and deadly creatures in order to do her job.

A wise old man with a much older friend takes over a captured alien spaceship and they set out on a mission to find new worlds and restore peace on worlds that were victims of the ship's former owners. In the process, they must battle more of the enemy aliens as well as make friends with the previous victims. Some of those victims have long memories and are as much or more dangerous than the original enemies at first contact. The mission requires the friends to recruit highly talented people to help them operate their ship.