The Hostage of Zir (Krishna #7) by L. Sprague de Camp PB 1st Berkley
The illustrated edition makes complex ideas much easier to understand.
L. Sprague De Camp
L. SPRAGUE DE CAMP The Ragged Edge of Science. 1st ed. Science essays
THE RAGGED EDGE OF SCIENCE by L. SPRAGUE DE CAMP. Owlswick Press, 1980. 1st edition. As-new hardcover in dustjacket. Not a circulated copy. Along with Isaac Asimov and Willy Ley, he was one of the great science-explainers of the period.
L Sprague De Camp Bronze God of Rhodes Genus Homo Goblin Tower 1st PB lot 3 VGGD
All titles by L. Sprague De Camp (Lyon Sprague De Camp) (1907-2000) as shown. THE BRONZE GOD OF RHODES; 60c; Bantam H2589; July 1963 1st print; 7.7. In this case, when it says 1st print, it may have had earlier editions in PB by previous publishers so in essence, a reprint.