with Ibn Rajab al-Hanbali’s The Sunna of the Caliphs
The purpose of this book is to do away once and for all with perilous misconceptions and to present over 160 proofs for the Sunni understanding of Sunna and bid'a as it was – and continues to be – set forth in classical, moderate, mainstream Islam according to the Sunni Salaf and Khalaf including the Four Schools of Fiqh.