Al-Ibhaaj fi Sharh al-Minhaaj lil Baydaawi - Imam As-Subki

One of the most well-known and important explanations (and there have been many) to Matn of Usul Fiqh, Minhaj al-Wusul of Imam al-Baydawi. This Sharh is that of 2 great Imams, the father Imam Taqi ad-Din as-Subki and his son Imam Taj ad-Din as-Subki.

It is really a profound authoritative explanation, in which the opinions are compared in case of divergences, the evidences, then the preponderant opinion is given according to proofs.

Very good edition in 3 large volumes, with authentication and annotations.