Numbers Game: An Introduction To College Mathematics By A College Student

For one, it contains a whole lot of expert knowledge with topics ranging from calculus to probability. In particular, the topics are single variable calculus, multivariable calculus, linear algebra, differential equations, discrete structures, and probability & statistics. Essentially, the book covers everything in mathematics that a college student (ideally a STEM major) would need throughout their undergraduate education. Think about it like this: why spend so much money on a number of over-priced textbooks throughout your undergrad years when you can get all that knowledge from a single, much more affordable alternative?
The unique aspect about this book is that it was written by a fellow student - AKA me - as opposed to the usual older professors, which is a very good thing because the way it was written reflects a student's thinking process, which I believe makes it easier to understand the content. Though everything was written and summarized by a student, it has also been thoroughly reviewed and proofread by other mathematics professors so any concerns regarding correctness or clarity should be addressed.
Plus, it's also not that expensive so you needn't worry about going over your budget. If that's not captivating enough, then there's also the part about profits going to a worthy cause so rest assured that your money is going to be put to good use.