Contained in this bundle are e-books from great scientists like Albert Einstein, Richard Dawkins, Alfred North Whitehead, Isaac Asimov and Paul Davies.

(picture source: Pixabay)
Where your money goes is up to you - split if freely among a charity of your choice, the publisher Open Road Media and Humble Bundle.
I suggest supporting charities that have been evaluated by charity evaluators such as GiveWell and have shown to make very good use of the funds they receive - not only in terms of efficiency, transparency and accountability, but also with respect to the impact they have on the world.
Examples for effective charities you can donate to through Humble Bundle are the Against Malaria Foundation, the Good Food Institute, Evidence Action and GiveDirectly.
Or you can support meta-organisations such as The Life You Can Save, Animal Charity Evaluators or the Centre for Effective Altruism which conduct research on how to help more effectively and raise money for effective charities.
-> Get the Brain Wave Humble Bundle and donate to The Life you Can Save
(only availabe until 13 June)
If you have questions regarding effective giving, or regarding specific charities, feel free to ask!