The Applied Math & Statistics Toolkit by Morgan & Claypool bundle is now live on Humble. While not directly books about game development math, they are more on math fundamentals and that is the underpinning of game development. As with all Humble Bundles it is organized into tiers:

1$ Tier

- Essentials of Game Theory
- Matrices in Engineering Problems
- Statistics is Easy 2nd Edition

8$ Tier

- Introduction to Logic 3rd Edition
- An Introduction to Proofs with Set Theory
- Discrete Distributions in Engineering and Applied Sciences
- Analytical Performance Modeling for Computer Systems
- Probability and Statistics for STEM

15$ Tier

- An Introduction to Multivariable Mathematics
- C Programming and Numerical Analysis
- Essentials of Applied Math for Engineers and Scientists 2nd Edition
- Fast Start Advanced Calculus
- Fast Start Differential Calculus
- Fast Start Integral Calculus
- Introduction to Statistics Using R
- An Introduction to Partial Differential Equations
- An Introduction to Numerical Methods for Physical Sciences

As with all Humble Bundles, you decide how your funds are allocated, between the publisher, charity, Humble and if you so choose (and thanks if you do) to support GFS using this link. You can learn more about the bundle in the video below.