Mildred D. Taylor: The Friendship and The Gold Cadillac

 Publisher: Bantam Skylark (1989)

Arnold J. Toynbee: A Study of History

Publisher: Dell (1965)

Image source here

Walter Tevis: The Man Who Fell to Earth

 Publisher: Fawcett Gold Medal (1963)

At first I wasn't sure if I could credit this cover to the Dillons, but if you closely in the lower right hand corner, you can see the distinctive looping double L of their signature.

Matthew Gant: Queen Street

 

Publisher: Regency (1963)

Kurt Vonnegut Jr: Canary in a Cat House

 

Publisher: Fawcett Gold Medal (1961)

James Baldwin: Tell Me How Long the Train's Been Gone

 

Publisher: Dell (1978)

James Baldwin: Another Country

Publisher: Dell (1969)

Malcolm Bosse: Captives of Time

Publisher: Laurel Leaf (1989)

Thanks for the extra images, Kristina!

James Baldwin: The Fire Next Time

 

Publisher: Dell (exact publication date unknown)

Image source here

James Baldwin: Going to Meet the Man

Publisher: Dell (1976)

Including this photo featuring an attribution style I don't typically see, from woobinewabbitts on Ebay.