Fortheloveoftorah
No offense to you and I dont want to discourage you from your project, however you cant write a book about Gedolim stories without knowing the sources you are getting them from and confirming that all details are true. You cant take a collection of stories posted here by anonymous people and use that for a book. Thats gives your book zero credibility and is an embarrassment to the memory of the Gadol that you are writing about. No regular person wouldnt want such a book about himself, let alone a Gadol Byisroel!