I tried searching through forums and internet for information on when change to Gallente & Minmitar Industrial skill books no longer seeded with NPC at 500k isk and available throughout most regions. Since early Dec 2021 these books are now hard to find and cost about 25x old price. I believe this changed in patch 19.11, but perhaps it is in a different patch or I overlooked the change for this in 19.11.
If anyone knows which patch changed this could you point it out?
Leto 2nd Atreides