Selecta Mathematica - Volume 1
Karl Menger
The Once and Future Worker
Oren Cass
Problems on Partial Differential Equations
Maciej Borodzik & Paweł Goldstein & Piotr Rybka & Anna Zatorska-Goldstein
Problem Books in Mathematics (1)
A Dictionary of Linguistics and Phonetics
David Crystal
Learning Concurrency in Python
Elliot Forbes
Sick and Tired?: Reclaim Your Inner Terrain
Maureen Kernion & Robert O. Young