Ahmadis have been deleting and editing their books for over 100 years. Its a non-stop cycle. I recently came across 4 early biographies of MGA that seem to have gone missing.
Sheikh Yaqub Ali Irfani (also called Sheikh Yacub Ali Torab) books Sirat-ul-Nabi, Sirat Ahmad, and Sirat Masih Maoud, which were published in (1915).
Pir Siraj ul Haq’s book Tazkirat-ul-Mahdi
Why are they missing?
These are the original sources of information on the life of MGA, in-fact, the famous pension story is quoted here and many other stories.
Naeem Osman Memon quoted Irfani’s book
There are a few quotations in this book. Which is a terribly written book. Feel free to surf it. https://www.alislam.org/books/3in1/index.html