What to read after Epistle to the Son of the Wolf?

The Epistle to the Son of the Wolf is the last major work of Bah�'u'll�h, founder of the Bah�'� Faith, before his death in 1892. It is a letter written to a Muslim cleric, a violent opponent of the Bah�'�s who, along with his father (called by Bah�'u'll�h "the wolf"), also a Muslim cleric, had put to death a number of Bah�'�s. In this work Bah�'u'll�h quotes extensively from his own previously revealed scriptures. This makes a large portion of the work a summary of excerpts on critical concepts expressed in previous works in a condensed form.Two brothers Muhammad-Husayn Nahr� and Muhammad-Hasan Nahr� came from an aristocratic and established mercantile family in Isfahan. The Im�m-Jum'ih of the city owed the brothers money and - when the two asked for a payment - he devised a plan to rid his debt. After confronting Shaykh Muhammad-Baqir, another influential Muslim cleric of Isfahan; and Sult�n-Mas'�d M�rz�, the son of N�siri'd-D�n Sh�h of this issue, the three devised a plan to imprison the brothers on account of their Bah�'� religion. The two brothers were subsequently arrested, paraded around Isfahan with crowds jeering abuse, and publicly executed in a humiliating manner.Bah�'u'll�h was heartbroken by the death of the brothers - he had met the two whilst a prisoner in Adrianople. He eulogized the two, naming them the King and Beloved of Martyrs, and the Twin Shining Lights. Bah�'u'll�h wrote the book in around 1891 to the son of the shaykh, named �q� Najaf�, whom he denounced as the wolf - hence the title Epistle to the Son of the Wolf. �q� Najaf� was also known for his persecution of the Bah�'�s. Bah�'u'll�h calls for him to repent for his and his father's wrongdoings and to investigate the faith.