I was going to ask if there is a good list of C books and then answered my own question. It categorizes _Modern C_ as Intermediate level.
https://stackoverflow.com/questions/562303/the-definitive-c-...
Note that this is not a complete list, fwiw. For example, I doesn't include "Effective C." [1].
I like "Effective C" over "Modern C" because it's more engaging ... "Modern C" is super rigorous and feels a bit like reading an annotated spec of the language, which is what an expert may need, but makes for a dull read for a casual C user like me.
--
Also see Fluent C: Principles, Practices and Patterns by Christopher Preschern.