Swim on the tortoise to the left and again rise upward, kick off the wall. Push the stone to the right. By the way, here the game is saved. Climb up the rope and go left. Jump down. Do not pay attention to the platforms on the left and the long rope. You just need to jump on the tortoise floating down. Do this and jump over the latest platform. Then - another one.
In the end, you will find yourself in a new part of the location. Jump from the turtle to the land and climb up. Go down, hold down the Shift and walk on the cracked floor. Push away from it to the ledge just above, and from it jump onto the rope. Climb up, climb onto a huge cobblestone and gnaw through the roots. It will break the floor, and you can pick up the second book. Jump on the ledge on the left, climb over it and go down. Jump from here to the tortoise when it swims.
Walk past the log and climb up to find yourself on a long platform with a few stones. First, push the small stone all the way to the right. Then climb onto the top of the platform and face the middle stone to the left. Push it to the left until it stops, climb up and open the passage to the second small stone. Arrange the stones so that they are above the pits below. The middle stone should be on the left, and two small over the middle and right holes. And then gnaw the roots on a huge stone that will fall and destroy the platform. Push the log on top, all the way to the left, after which it will be possible to jump from there to a hill.
Climb up, push away between the walls, and then push the stone all the way to the right. Only place, you can jump onto the platform.
From it, jump to the rope and climb up. Do the same with the second rope. Above, go all the way to the left (instead of jumping between the walls above), jump down and pick up the third book. Break the pebbles and slide down. Repeat the steps to climb up the ropes. Push away between the walls and find yourself in a new place.
The wall on the right can only be dug from the other side. Jump over and dig the wall. Push the cobblestone all the way to the left, but make sure that it does not fall down. From there, jump up, push another stone and climb higher.
There will be a more difficult puzzle. Jump up and hit the middle stone below one platform. Push it to the left edge of this platform, climb up and jump to the log. Push the log to the left to push it.
Push the middle stone to the bottom, then move to the closed passage on the right, behind which there is a small stone. Break the wall, and then push the middle stone all the way to the left. Throw it into a small pit. Go back up the rope, go up and use the wall and logs to jump higher. Move to the wall, which is built under a huge stone, and destroy it.
Go back, right, go up to where the middle stone was. From there, move even higher and go to the top of the roots, holding a huge cobblestone. Gnaw them so that the cobblestone falls down, right on the middle stone. Get down on the right side and push the small stone to the other two so that with its help you can climb a large cobblestone, and from there jump onto the ledge on the left.