The wall

de E. C. Tubb

Business associates Kerron, Chang and Forrest, three of the richest men on Earth, are old and approaching the end of their days. Desperate to prolong their lives, they seek the man who seems to have the secret of immortality: the mysterious Brett, an adventurer who has apparently lived for centuries. But Brett hides a dark secret ... and for him to help them, they must accompany him on the most dangerous journey - to the centre of the Galaxy - beyond the Wall!