These 3 books of Gelfand from the Soviet correspondence school in mathematics are short and on the point. They are the best books to learn Algebra(the high school one) and graphs(one could say that the method of coordinates is still about graphs) since they don't waste your time with so many random images, bullshit texts assuming you have an IQ of a baby among other things from current books.
The first book, The method of coordinates, since it explains what are curves, lines, geometric figures and surfaces. The book also has a four-axis scheme for making flat graphs of R^4, it's an interesting, but useless part. It explains how coordinates works and, as one can easily see, how important was this idea when Descartes came up with it.
The second book, Functions and Graphs, is all about plotting your functions. It teaches you how to plot a function, how many points is enough for you to have an overall idea of the simple functions and so on. It's also interesting to see how many things one need to do to get a basic idea of the graph of a function when he doesn't use Calculus. It's amazing that applying limits and derivatives(which is also a limit by itself), you can easily study a function compared to the methods used in this book. It's still nice to know, so one can appreciate Calculus even more than one should.
The last book, Algebra, is the best book of the trio. In fact, he is the reason I consider these 3 books the best to learn pre-calculus. It teaches Algebra by doing, it says something and then you have many exercises, some the author solves it and the rest you have to solve. Almost all of the exercises are computations(after all, what would you expect from a high school math book?), but there are some interesting ones asking the reader to prove stuff. The best exercise is Problem 221: "Find a recording of Bach's Well-Tempered Clavier and enjoy it."
Overall, they are simple and short book, but worth to read and more so if you intend to teach your younger brother or son some good algebra.