I have too much time on my hands and too little motivation :( (Sandbox, if you want to look at the scrap I've gathered over the years)
Variously either here (primarily FF4, FF4TAY, or Bravely Second, mostly monster data) or at the Kingdom Hearts Wiki. I edit at whim, and may well be absent for long periods of time if there's nothing for me to do.
Rare sources I have access to
All books are in Japanese.
Final Fantasy IV [DS] Official Complete Guide
Final Fantasy IV [DS] novelisations
Final Fantasy IV The After Years novelisation
Final Fantasy IV Complete Collection Official Guide Book
Bravely Default Flying Fairy Official Complete Guide
Bravely Default For the Sequel Official Complete Guide
Bravely Second End Layer Official Complete Guide
Bravely Default Design Works The Art of Bravely 2010–2013
Bravely Second Design Works The Art of Bravely 2013–2015
There's also an Official Complete Guide for The After Years, but apparently my bookstore's supplier is out of stock...meaning no, I don't have it and I don't know if it'll be available in the future.