I search for a isekai manga where the mc is a magician in a hero party and he is weak and because of his weakness his party abandoned him then someone give him a weird book of mage that contains all kind of secrets. He gets op then with this book

Please help me this manga is very good but I forgot its name

I’m searching for an isekai manga where the mc is a magician in a hero party and he is weak and because of his weakness his party abandoned him then someone give him a weird book of mage that contains all kind of secrets. He gets op then with this book.