Have not read it yet, but recently researched this question and came to this book as a readable overview of the latest thinking in cosmology, Battle of the Big Bang: The New Tales of Our Cosmic Origins by Afshordi and Halper [1].

The book assumes a basic knowledge of physics and cosmology so it does not spend half the book reviewing basics like many pop physics books do.

[1] https://press.uchicago.edu/ucp/books/book/chicago/B/bo244963...