After Take Me to Your Leader
The End of Everything by Katie Mack
If Tyson gave you permission to geek out about aliens at cocktail parties, Mack does the same for the universe's actual death. Same evidence-first clarity, same smirk against pseudoscience, but now you're casually explaining vacuum decay instead of exoplanets. It's existential cosmology that makes you feel smart for being curious, not credentialed.