It was published on 26 June, 1997 and the bestselling fantasy novel series is marking its 20th. Trending Questions How do sunspots affect solar radiation? Which part of the solar system is associated with the name Solis Dies? Which position will earth be in after 18 months have passed? What would an astonomer conclude if he or she observed that the spectrum of a star had shifted to the blue end? How long to fall to earth from strotopause? What is the name of the process that converts hydrogen into helium resulting in large amounts of energy within stars? How does a meteorite relate to space? How long does it take for mercury around orbit the sun? What are the 5 dwarf planets in our solar system? Who discovered the orbit of each planet is an ellipse by using mathematics? What is evolutionary theory of the solar system? What is the name of the line which is the furthest point north where the sun is ever directly overhead at noon? Why does the gravitational pull of the sun and moon affect the ocean? What is our chance of impact from objects outside our atmosphere? What are valid names for the equinoxes? Why is the earth dark at night and light during the day? Why is the moon angry with the sun? What is the ZENITH angle for a person standing at 30. How long did it take to write the first Harry Potter book 01 /11 Harry Potter and the Philosopher’s Stone by J.K Rowling J.K Rowling took six years to write Harry Potter and the Philosopher’s Stone, the first book in the Harry Potter series.