2026 Reading Challenge

Join the Goodreads Author Program

Are you B.L. Keyfitz, author of the book below?
Nonlinear Evolution Equations That Change Type by Barbara L. Keyfitz


To join the author program as B.L. Keyfitz, you will first need to sign in to Goodreads. Then navigate back to this page to apply.


About the Author Program
Authors on Goodreads
Author Guidelines
Author Program How-To
Author & Advertisers Blog
Ask the Author: Featured Authors
About Goodreads