The Bhagavad-Gita, translated by Barbara Stoler Miller

Read it quite quickly to get a flavor of the book.
Translation is ok, but lack of notes.

Published by Columbia University Press, 1986. ISBN 0231064683.

The Upanishads: Breath of the Eternal Hardcover by Swami Prabhavananda, Frederick Manchester

Pretty good translation.
Not complete translation; I read it to get a taste of Upanishads before diving deep it.

Vedanta Press. 1971. ISBN 0874810078.