This is going to sound odd at first but I'd also recommend the Science Of Discworld series. Despite the title, they illustrate real-world science using a fictional Discworld story to make it accessible and digestible. They are also thoroughly entertaining.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'