The third book is relatively easy. When you come to the witch's house, there is an entrance at the lower right, which can be opened with digging gloves. After you go in, you come to the small eye. There is a big tree above the hut. After sprinting into the magic circle, it changed, entered the room from the back of the hut, pushed the bookshelf to the right, walked to the fireplace and pushed the book down. After collecting all three books, I went to the upper left shelf on the second floor of the library. I chatted with my elders and suddenly fell into a cave with flippers. Now I can swim to the next element maze.