Im not good at maths but to get my work done this books helped me a lot:

https://www.amazon.de/Problem-Solving-Algorithms-Structures-... If I remember correctly it is Python 2

https://www.amazon.de/Algorithms-Illuminated-Part-1-Basics/d...

https://www.amazon.de/Algorithms-Illuminated-Part-Graph-Stru...

https://www.amazon.de/Algorithms-Illuminated-Part-Dynamic-Pr...

Can you deal with Python? This is free and available on-line as just a regular static site. (http://interactivepython.org/courselib/static/pythonds/index...).

From what I could tell, it's the full version of 'Problem Solving with Algorithms and Data Structures Using Python 2nd ed', 2011. I haven't read it cover to cover, but it seemed well written. You can read some reviews on the printed version at http://www.amazon.com/Problem-Solving-Algorithms-Structures-...