Alternative to Dan Stefanica's Books

[RadNerdSuit]

Hello!
I'm going to apply during the Fall 2022 cycle. I was hoping to brush up on my knowledge of mathematics, programming and finance and saw great reviews about Dan Stefanica's books. Unfortunately, due to personal reasons, I cannot shell out that much money to buy the books. What are some alternatives that will help me brush up my knowledge+ help me prepare for the interview?

 

[quanthopefully]

find the pdf versions

 

[RadNerdSuit]

find the pdf versions

I tried. But all I could find were a few pages of the solutions manual.

 

[Cecian]

I tried. But all I could find were a few pages of the solutions manual.

Indeed, the full version, practically not, at least, we have not yet found it.