Issue 1

Dear Readers, welcome to this year’s first issue of Parabola, dedicated to my colleague Peter Brown. In this issue you will find three excellent articles, beautifully-set problems and, as something new, a book review.

Issue 2

Dear Readers, the articles in this special issue of Parabola were written by high school students and introduces the comic $2\mathbb{Z}$ Or Not $2\mathbb{Z}$. I dedicate this issue to my colleague Susannah Waters.