Q: Will you be porting this mod to older versions/Fabric/Quilt?
A: While I will not be developing this mod for any loader besides Forge, I am considering a port to 1.18.2. Older versions such as 1.16.5 or 1.12.2 will not be considered.
Q: May I use this mod in a modpack or make a video about it?
A: Yes, of course! :) As long as you include credit and don't claim Technoblade Eternal as your own creation, we're good.
Q: Wait, Hot Potato Books give experience? Is that balanced?
A: I understand that some may be concerned that experience can be farmed by growing potatoes - if you happen to be concerned, here's all you need to know! TL;DR at the bottom. Hot Potato Books are intended to be an alternative to traditional experience farms - whether that be using Endermen or Zombified Piglins. The average automated potato farm can output roughly 700-750 potatoes per hour, which is equivalent to about 27 Hot Potato Books per hour (assuming you have a large supply of paper, leather, and furnaces). The most popular Enderman farm I found on Youtube produced 153 experience levels per hour (assuming the player begins at 0 levels and does not spend a single point for an hour). With this in mind, 27 Hot Potato Books (about an hour of potato farming) yields anywhere from 150 to 153 experience points with the same restrictions. Hot Potato Books also require three farms for reliable experience (leather, paper, and potatoes), alongside added friction of needing to craft the books. Their main utility in the end is their portability - making them the best portable experience in vanilla by far. To balance this, they do not stack.
TL;DR: Hot Potato Books are balanced with the intention of being equal to an efficient Enderman farm. They are likely more inconvenient to mass produce than a mob farm, depending on circumstance. Either way, they are an alternative to mob experience farms that are intentionally not stronger than conventional mob farms.