These books are great resources for anyone interested in criminology. You can use them for self - study, to gain a deeper understanding of homicide investigations and the psychological aspects of crimes. When handling the books, make sure to wash your hands to avoid soiling the pages. Store them in a dry and cool place to prevent damage from humidity and heat. Don't bend the pages or put heavy objects on them to keep the bindings tight. If you notice any signs of wear, you can use a soft cloth to gently clean the covers. Enjoy exploring the world of criminology with these wonderful books!