Fiqh al-Sunnah - Sayyid Sabiq (4 vol.)

This work is not based on a particular Madhab, the author gives opinions from the scholars other madhabs, judging each opinion on its own merits. Sayyid Sabiq (1915-2000 C.E.) wrote the book in Arabic at the request of Imam Hassan al-Banna, the founder of the Muslim Brotherhood (Ikhwan). 

Every Fiqh ruling in the book goes back to the Qur'an and Sunnah and Sabiq dealt with all four madhahib objectively, with no preferential treatment to any.