A book or a publication by Shaykh Nur al-Din ‘Itr titled "Haj and Umrah According to the Four Sunni Schools of Law (with Pilgrim’s Companion Booklet). A comprehensive guide on performing Hajj and Umrah, two significant pilgrimage activities in Islam, from the perspective of the four major Sunni schools of Islamic jurisprudence.
The inclusion of a "Pilgrim’s Companion Booklet" suggests that the publication might also provide practical advice, supplications, and step-by-step guidance for individuals undertaking the pilgrimage. This can be especially useful for those who want to perform these acts of worship in accordance with their school of thought.
Shaykh Nur al-Din ‘Itr is likely the author or a prominent figure associated with the compilation of this guide. It's common for scholars and experts in Islamic jurisprudence to compile such guides to assist Muslims in fulfilling their religious duties correctly.