Lava - The Journeys of McGill Feighan, #3

Third book in the rollicking, galaxy-spanning SF adventure series that will make your imagination spin! McGill Feighan is able to "fling"-or teleport-himself or anything else as far away as he can imagine. As such, he makes a rather substantial living by flinging anything and everything, for a fee, to the far corners of the universe. His real quest, though, is to find the Far Being Retzglaran, who has meddled in his life since birth. Oh, and he's trying to avoid the dread Organization, which is trying to kill him at every turn.
They've had a contract out on his life since he was four days old, but they've been unsuccessful. So far. Now McGill teams up with an Actuni plant-monk-who is not your everyday sentient cactus-as they flee the PsychSection of the Flinger Network and seek an encounter with the most ancient of all mysteries.  It is a thorny dilemma indeed.