The Author of the Book “Zest for Life” is
3. Emile Zola
The author of book “Zest for Life” was Emile Zola. This book was first published in 1959.
Facts according to Amazon:
- Publisher: Bestseller Library; First Bestseller Edition edition (1959)
- ASIN: B0027IXCLC
There are many books with the same title “Zest for Life” has been published earlier, but with reference to options given in this question, Emile Zola will be the right answer.