Reincarnated, They All Call Me a Genius

Farming + science + magic. The father of the royal family, the mother of the elf, and the reincarnated me. Alvin, who was reincarnated into a different world, started a library! He can read and remember at the age of three, unlock all magic attributes at the age of four, and "establish a sect" at the age of five. Farm and open up wasteland, fight monsters and upgrade, and grow along the way. What is another world? What is magic? I'm curious!