There is no one answer to this question since there is no one way to "crown" a character. Some people may feel that they need to read a certain number of books in order to fully understand and appreciate a character, while others may be able to do so with just a few.
That being said, if you are looking for a more general answer, then you could say that most people would need to read at least a few books in order to get a good sense of who a character is. This is because characters are often complex and multi-faceted, and it can take time to get to know them. Furthermore, characters often develop and change over the course of a book (or series of books), so it is important to have some context in order to understand how they got to where they are.
Of course, there are always exceptions to the rule, and some people may be able to get a good sense of a character from just one book. However, this is usually not the case, and it is usually necessary to read several books in order to really get to know a character.
