"Concepts of Modern Mathematics", Ian Stewart, Dover, 2017

and

"Partial Differential Equations for Scientists and Engineers", Stanley J. Farlow, Dover, 2018

The books are tight and clean. The spines are straight and the covers are not loose or torn. There are no missing, loose, or torn pages. There is no writing or highlighting in or on the books. There are no stamps or stickers. There are no nameplates. These are not ex-library books.

Please see all photos.

Ships free to the USA within twenty-four hours via USPS media mail, except weekends and federal holidays.

All books ship in boxes with tracking numbers.