Book Recommendations
Within each section, the order in which the books appear in the list is roughly the order in which I read them. In some cases, this also roughly corresponds to the order of difficulty—from easy to advanced, e.g. for the math books.
There are only a limited number of books presented here because these are just books that I have read (and remember). Certainly there are many other great books.
For books that are in English or have English translations, I listed the English title as the primary title. Otherwise—for books that do not have an English version, meaning I must have read them in Chinese—I used the Chinese title instead.
Nonetheless, where relevant, I still included the original and Chinese titles (if the primary title is not already in Chinese).
Mathematics
德國一流大學教你數學家的22個思考工具 — Christian Hesse (2009)
Das kleine Einmaleins des klaren Denkens: 22 Denkwerkzeuge für ein besseres Leben