This book has been long out of print (the copyright is 1974), so I'm very glad to see it back in print.
This is a collection of classic short stories by some great writers, both in and out of the SF field. They include William Tenn, Avram Davidson, Isaac Asimov, Carol Carr, Robert Silverberg, Horace L. Gold, Pamela Sargent, Bernard Malamud, George Alec Effinger, Robert Sheckley, and Isaac Bashevis Singer. It's notable also for the only laugh-out-loud story that I've ever read from Harlan Ellison.
My only complaint, if you could call it that, is that a newer version of this anthology is long overdue. I recommend this book highly and without reservations.