That's a requirement for a test I'm going to take. I tend to learn better with well designed, reasonably comprehensive books that don't treat me like a dumbass (not as a genius either!).

Please notice that I'm not asking for websites, interactive platforms, videos, or whatever, but about books, preferably ones that I can study on my Kindle (so PDFs are not ideal). I know all the major websites but I just can't follow them.

I can pay very small amounts but I'm pretty much unemployed in a third world country so free is always better.

If there are requirements to understand such books, kindly inform!

I finished school more than 20 years ago and I was not a good student. But I'm kind of a decent learner now that I have a diagnostics (ADHD).

Thanks a bunch!

EDIT: guys, I am actually a beginner in the sense that I literally know little to nothing about the subject! I'm also not a math wizard. Advanced suggestions are appreciated but also entirely useless. This is also for a test, so, beyond a very brief introduction, general understandings on the Neil DeGrasse Tyson level is also of little use for me. I don't need to understand the beauty of the cosmos, I need to pass a test. Thanks!

Hi all,

I am a PhD student focusing in cosmology. I wanted to up the science content here on Tildes, and I thought that one way to do so is to have an informal little Q&A session. As such, feel free to use this post to ask any questions you might have about cosmology specifically, and physics in general.

This may not be as exciting as some other science AMAs given that I am a rather early graduate student, so there may be a lot of questions I don't know the answer to. However, I'm willing to try my best and answer over the next few days, and to let you know I don't know if I don't!

A bit about myself: I did my undergraduate degree at the University of Chicago where I studied physics and mathematics, and then I was a student researcher in a computational cosmology group at a national lab. I subsequently enrolled at UC Davis to continue studying cosmology. Ask me anything about physics, cosmology, or high performance computing!

I also invite anyone else with expertise to chime in as well!