According to Cambridge dictionary, any can mean more than one:
Any or every?
We use any and every to talk about the total numbers of things in a group. Their meanings are not exactly the same:
Any doctor can prescribe medicine. (or Every doctor can …)
Every always refers to the total number of something. Any refers to one, several or all of a total number. We use every not any with singular countable nouns when we mean ‘each individual member of a group of something’.
Then, can I consider "take any book you want" means I can get more than one book?