This is our Science book that we love. We only have one more chapter and we will be finished with Science until our new Anatomy book comes to us in May. They have a wonderful suet recipe in it that I make off and on for our birds. We love all the birds that come and visit our yard. The squirrels really like it too. lol. If anyone is interested let me know and I will post the actual recipe. It usually makes 8 suet cakes which will last us a couple of months.