Sudoku: 300 intermediate level puzzles

Just presented:

First edition of a collection of three books that are made up of 300 sudokus each of medium level for kids, young people and adults with very large numbers easy to see. we invite you to the search for solutions to this wonderful thinking game without much math, just with a little skill, strategy and technique we will solve the challenges we find that could also be an excellent gift for your loved one. thank you .