Book Tripe refers to a kind of tripe from the third stomach of the cattle, cow or ox called the Omasum which is the part of the cattle's (cow or ox) stomach which filters through all the food the cattle eats and where cud is broken down and pressed further. Book Tripe is also known as Thick Seam Tripe, Bible Tripe or Leaf Tripe since it looks like pages or leaves of a book. In the Philippines, it is used as an ingredient for making Goto, a porridge/gruel with tripe as a basic ingredient and the dish called Pinapaitan (innards cooked with beef bile which is bitter in taste when cooked)