I am trying to follow the beautiful notes by Peter Scholze on condensed mathematics (<https://www.math.uni-bonn.de/people/scholze/Condensed.pdf>)


I am noting that the hard time that I am getting is a lack of basis in Grothendieck topologies, sites, and so on, things that are not from the theory of condensed math itself but prerequisites.


So I would like to know if is there a standard book, or nice notes used for the introduction on such matters, with more concrete examples of the objects defined.


Thank you very much for any suggestions.



Reference request for condensed math
Dagur Ásgeirsson has written [a text](https://dagur.sites.ku.dk/files/2022/01/condensed-foundations.pdf) to fill this gap:



> 
> We discuss in some detail the prerequisites for each of the first four chapters of Scholze's "Lectures on Condensed Mathematics". Some proofs are
> given in more detail or slightly altered, but all the main ideas are
> the same. In particular, I claim no originality of the results. It is
> my hope, however, that I have succeded in creating a more accessible
> presentation of the foundations of condensed mathematics, along with
> the prerequisites, than has previously been available.
> 
> 
> 


