The Free Man's Library
Henry Hazlitt
Discrete Mathematics with Ducks
Sarah-Marie Belcastro
Compositional Data Analysis: Theory and Applications
Vera Pawlowsky-Glahn & Antonella Buccianti
A History of Mathematical Notation. Vol II
Florian Cajori
Topological Methods for Variational Problems With Symmetries
Thomas Bartsch
Mixed Methods: A short guide to applied mixed methods research
Sam Ladner