Ascents of Wonder, edited by David Gerrold. An original anthology - all stories new to this 1977 paperback.

“Tom Sawyer's Sub-Orbital Escapade” by Lisa Tuttle & Steven Utley
"The Light at the End of the Penumbra" by Greg Feeley
"Love Among the Symbionts" by J. Michael Reeves
"A Modern Parable" by Christopher J. Crowley
"Portrait of the Artist as a Young God" by Stephen Goldin
"The Exempt" by George Alec Effinger
"Scrapings" by Kenneth Von Gunden
"The Perambulator" by Mel Gilden
"White Hole" by Daniel P. Dern
"Just an Old-Fashioned War Story" by Michael G. Coney
"Contact Myth" by Joe Pumilia
"Equinoctial" by John Varley