The inhabitants of Terra nicknamed them "Angels".They were exquisitely beautiful, these shimmering, fiery creatures , highly intelligent and playful. Yet they were awesome, too, considering that the youngest were four million years old, and the oldest had probably participated in the First Cause, which had given birth to the whole universe. To young space cadet Jack Loftus fell the overwhelming responsibility of negotiating a treaty with them--a treaty which could mean the life or death of earth and mankind.
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Used availability for James Blish's The Star Dwellers
December 1961 : UK Hardback
February 1982 : USA Mass Market Paperback
February 1979 : UK Paperback
1961 : USA Mass Market Paperback
May 2013 : UK Kindle edition
Title: The Star Dwellers: Heart Stars Book 1
Author(s): James Blish
Availability: Amazon UK