This is a very interesting book. As many USSR books, it is very heavy on computations rather than modern ideas. It offers 320 problems from many areas of mathematics, all with (very) elementary solutions. There is almost no prerequisite to read it, and although it usually does not show the "best" (i.e., most simple, elegant or clean) solution, it generally shows the low risk path of heavy calculations. The last (american) edition is still plenty of typos and small errors, but they are in general easily identifiable. Note that it is also a big book, mainly because the solutions are very long, in favor of being elementary.
The problems of the book are divided by field into a dozen chapters, and within chapters, problems are roughly grouped by similarity and ordered by difficulty. I found particularly useful the first 3 chapters, as well as the Algebra one.