Qur'an and Hadith
Hadith (The sayings of The Holy Prophet)
Fabricated Ahadeeth (to warn Muslims about them)
Riyad-us-Saliheen by Imam An-Nawawi. See also this The checking of Ahadith - Corrections made by: Shaykh Muhammad Nasir-ad Deen Al-Albaanee
An Introduction to the Science of Hadith by Suhaib Hassan