Need you to suggest a good book for 13 to 15 years boys regarding puberty by reading that book they can be away from sins and bad habits and know what are the body changes appear.
الجواب وباللہ التوفیق
Have some trusted Scholar in your locality give guidance to the boy in this respect. Have him attached to the Tableeghi Jamaat, Inshaa Allaah he will gain adequate basic information from there. There are several books available at the book stores on the education and upbringing of the children and Islamic Studies. You may get books from there and give them to the children for reading.
واللہ اعلم بالصواب