Probably not what you are looking for, but i like these elementary books: Mathematics for the curious - Peter Higgins Mathematics rebooted - Lara Alcock Math

Probably not what you are looking for, but i like these elementary books: Mathematics for the curious - Peter Higgins Mathematics rebooted - Lara Alcock Mathematics: a very short introduction - Timothy Gowers The Essence of Mathematics Through Elementary Problems https://open.umn.edu/opentextbooks/textbooks/the-essence-of-mathematics-through-elementary-problems https://open.umn.edu/opentextbooks/textbooks/the-essence-of-...