Its a pity that this book is out of print. My Piskunov's books were bought in the eigthies. Mir Moscow Edition 2. vols - aprox. 10 dollars. If you are a high school student that prefer more concrete applied mathematics (to abstract math) you will really like this book. Full of examples. Very clear.Very practical. And an objective reference to the busy professional that aims to go straight to the point.I think it deserves 10 stars (5 to each volume).