For some years now, I have been running a senior-level course in Dynamical Systems, a branch of pure mathematics that focuses on the theory underlying what it means to model phenomena mathematically. I designed this course and over the years have developed quite an extensive set of notes. These notes are now a text, to be released by Oxford University Press in August of 2018. The text is:
A Modern Introduction to Dynamical Systems
2018: Oxford University Press
Contributed Chapter for:
Mathematics for the Curious: Why Study Mathematics?
2015: Curious Academic Publishing
Editor and author for:
30-Seconds Maths: The 50 Most Mind-Expanding Theories in Mathematics, Each Explained in Half a Minute
2012: Ivy Press LImited
Note: As of June 2018, there are 248,250 copies in print. This includes 1000 in Mongolian, 10000 in Swedish, 55000 in German, 8000 in Chinese, and 39000 in French, along with 8 other languages.