Jack L Chalker - Midnight at the Well of Souls torrent

Midnight at the Well of Souls (Saga of the Well World #1 by Jack L. Chalker

Nathan Brazil, a cargo ship-for-hire owner, detours from his route to answer a distress call. A hidden stargate hurls him and his passengers to the Well World, the master control planet for the cosmos created by the now-gone godlike race who designed the universe. Now someone wants to find the Well of Souls to seize control of all the cosmos--and it's up to Nathan to stop them