salam, Amir Uthmani was the nephew of Shabir Ahmed Uthmani and editor of monthly tajalli magazine. Allama Arshadul Qadri Rahimahullah sent him zalzalah for book review secion in tajalli. Then he(Hazrat Allamah Arshadul Qadri Rahimahullah) added Amir Uthmani's review in later adition of zalzalah along with his reply letter to Amir Uthmani. Actually, Dawat-e-Fiker is foreword of Zalzalah. later dio-bandits wrote several books to clearify their position, but the truth is that zalzalah and then zair zabar (which is reply to replies by dio-bandits) were a hard slam in dio-bandits face and they can never answer to the objections/questions raised in the two aforementioned books. you can realize how effective these two books are if I tell you about my own experience I had with my firends. one of my best friends, now he is dearest to me, was a fanatic hard liner diobandi. He has had many debates with me but to no avail. He used to disparage Imam Ahmed Rida Rahimahullah in front of me and I kept my patience. Then I gave him zalzalah and zair zabar and Taskeen-ul-Jinnah Fil Mahasin-e-Kanzul Eman by Hazrat Allama Ghoth Bhatralvi (May Allah Subh'ano wa Ta'ala save him). After reading those books specially zalalah and zair zabar (because they were about diobandits) he changed his mind and has become a staunch sunni. He took these two books to the office of Tahreek Khatm-e-Nabuwwat (run by diobandits) and in his own words they could not answer him and just kept smiling (of course out of shame). father of my another friend was very inspired by diobandits. He gave me Palan Haqqani's Shariat ya Jahalat, in return I gave zalzalah to him and after reading it he said 'if the objections are true then diobandis are really munafiqs'. To verify the truthfulness of objections you only need two books; zalzalah by Allah Arshadul Qadri and Hikayat-e-Olia (also know by Arwah-e-Thalata) published with endorsement of asharf ali thanvi. wassalam. n.