What is the fine-grained topic of the following text: I read a lot lately amongst other things… I read about rockets, rovers on Mars, physics, astronomy, telescopes, but there is this “Rocket Boys” book (check out our modest library of books) recommended by my brother some time ago, that I fell in love with. Only return the topic.
Reading and learning about space exploration and astronomy, with a focus on the "Rocket Boys" book.