Book "Mathematik  einfach verständlich" (German) 

The book "Mathematik  einfach verständlich" adresses all high school students, mathematics teachers of high schools or students in the first semesters, which wish to deepen their knowledge of mathematics. The book leads the reader from the basis of algebra or geometry up to the differential and integral calculus or probability theory. The compact held but complete theory is illustrated by numerous examples, so that the reader can familiarize himself with the different situations. The chapters are complemented by blocks of tasks. The reader will find the solutions at the end of the book. 
ISBN: 9783952390702 
Here you can view excerpts from the book in detail as a pdf file: The book in brief:
