"Understand Ramadan" will help you understand, how to spend the Holy month of Ramadan. It will also help in understanding which actions are not allowed to do in Ramadan.
Few other topics are also discussed according to the importance of those in Ramadan:
2) Laylat ul-Qadar
3) Eid ul-fitr
5) Reciting Holy Qur'an
6) Offering Prayers