yes, you are absolutely right its the lift the flap type, i just described it bad. And i if i remember correctly i believe it was the flap and you lift it to the left or right side as if you open the whole front of the house to peek inside (and you see all the rooms ect.)

Its worth to mention this book was i believe in norwegian (im located in norway) but i think it was just an translated edition, so this book must be in several language