What is the proposed ladder for progressing in comparative jurisprudence, starting from books on minor disagreements all the way to books on major disagreements, in order to learn the sayings of scholars, their evidence, and their reasoning?

Comparative Fiqh (Islamic jurisprudence) cannot be properly studied except after mastering a foundation in Fiqh according to a single madhhab (school of thought). Then, the student of comparative Fiqh should continue through the books of that madhhab. Scholars have written graded books in the various Fiqh schools, such as the books of Imam Al-Ghazali in the Shafi'i madhhab, the books of Ibn Qudamah in the Hanbali madhhab, Al-Istidhkar by Ibn Abd al-Barr in the Maliki madhhab, and Al-Mabsut by Al-Sarakhsi in the Hanafi madhhab. Among the important books for understanding differences of opinion and their reasons are Bidayat al-Mujtahid by Ibn Rushd, and Al-Muhalla by Ibn Hazm, which is recommended to be studied at a later stage.