These days I’ve read (part of) a nice introductory book in french by Pierre Ageron on intuitionistic logic.
I haven’t read the later chapters on category theory, about which I’ll only remember the following sentence:
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“[…] one distinguishes small categories, those for which the classes of objects and of arrows are sets, from large categories, which are all the others. Beyond merely the language of categories, common to both small and large categories, it’s in reality the dialectic articulation between small and large categories which does constitute the heart of category theory.“
I was more interested by the beginning of the book, which I’ll summarize for myself as follows.