When the ball is kicked in the air over the touch line?

When the ball is kicked in the air over the touch line but bends around and lands back in the field of play, is it still in play? I can't find an answer to this in the Laws.

Yes the ball is still in play. It is only dead when the ball hits the ground or an object or person on the ground. See my previous answer why this is so important tactically and technique wise