Is the second harry potter called Sorcerers stone or philosophers?
No. Both are titles for the first book. It was originally called “Harry Potter and the Philosopher’s Stone” but when the book was published in the USA, the publisher there thought kids wouldn’t want to read about a philosopher or his stone, and so changed it to “sorcerer’s”, because that sounds much more exciting. The author wasn’t happy about the change – “philosopher’s stone” has a meaning that goes back centuries, “sorcerer’s stone” is just made up – but at the time, she didn’t have the influence needed to oppose it. The second book is called “Harry Potter and the Chamber of Secrets”, and has the same title in all English-speaking countries.