
Pergamon international library of science, technology, engineering and social studies.
- University Physics by Young and Freedman
- Fundamentals of Physics by Halliday, Resnick, Walker
- Modern Physics by Krane
You might guess that real physics is not actually in freshman textbooks, and you are right. Modern physics requires rigorous mathematics.
For a nonrigorous introduction/overview:
- The Road to Reality by Roger Penrose
If you want to actually learn almost all of physics at a high level:
- Course of Theoretical Physics by Landau
Note that Landau is extremely difficult.
If you want to learn the math needed for modern physics (topology) in the context of physics, nonrigorously:
- Geometry, Topology, and Physics by Nakahara
Landau and Lifshitz vol 5 <https://en.wikipedia.org/wiki/Course_of_Theoretical_Physics#...> is the standard textbook. There's an older copy on the Internet Archive <https://archive.org/details/landau-and-lifshitz-physics-text...>. (Having the background of L&L vol 9 makes a classroom demonstration even easier: a small handful of electronic parts for a resistive-capactive low-voltage DC electric dipole, a decent oscilloscope or other apparatus to measure and record fluctuating voltage, and a thermometer).
The probability of an out-of-equilibrium structure spontaneously fluctuating (briefly!) into existence depends on the complexity of the structure, and Boltzmann brains are much much much less complex than the whole Earth, solar system, Milky Way, or the early universe in which these structures' precursors originated. So therefore any theory compatible with statistical physics in which the early low-entropy state of the universe is a fluctuation in a higher-entropy "gas" is imperiled.
For the philosopher or two who wrote comments above in this thread, https://plato.stanford.edu/entries/statphys-Boltzmann/ is probably of interest.
Check out L.D. Landau's Course of Theoretical Physics if you're open to reading a textbook.
Course of Theoretical Physics
- "A Course of Higher Mathematics", Smirnov. This one could be a bit expensive, but if you find yourself in a country that has had good relations with the former Soviet Union, you might find it a a really affordable price because they had licenses to print these books, and generally speaking, the MIR Publishers, Moscow, books.
- "Problems in Mathematical Analysis", Demidovich.
- "Course of Theoretical Physics", Landau.
- "Problems in General Physics", Irodov.
You'll note that there are "course" books and "problem" books in there.
All the best,