If you add this to your hand without drawing (e.g. via Research Librarian), the Revelation ability still triggers.
- Moving damage or horror is different from 'dealing' or 'taking' damage or horror, so does not trigger effects or allow the player controlling Daisy Walker to reassign the horror.
顯現 - 將死靈之書放置入你的威脅區域，並在卡片上放置3個恐懼。該卡如果有至少1個恐懼，則不能離場。
This is an interesting Weakness to rate. Looking at the two elements, the effect and the discard condition, we get:
The effect: Swapping the for the isn't fun, and it doubles you chance of auto failing, but... it's possible to go an entire scenario without seeing either token, so it's on the lower end of the punishment scale for signature weaknesses. It could even help you, if Daisy is running Voice of Ra, where the grants an extra 2 resources, while the is a miss. If you've had the bad luck to get Nihilism as your Weakness, you might feel differently. Still, not incredibly punishing.
The discard condition: 3 actions and 3 Horror, and the actions can be Daisy's bonus Tome actions. Daisy has a high Sanity, but this still eats a third of it. 2 actions to clear a Weakness is pretty standard, so 3 bonus actions is fairly forgiving, and Daisy can always pack Fearless (2) to recover from her unwise bedtime reading.
All in all, this is a below average signature weakness.
Generally speaking, this is probably one of the most forgiving special weakness cards in the game so far. You don't have to take the horror off of it if you don't want to, and let's be honest, how many times do you actually pull that blue token out of the bag anyway? That particular portion can be quite swingy in its effect, I have lost at least one scenario where I drew the blue and then the red token and we lost. But overall I find the worst part of John Dee's Translation to be how it usurps a hand slot. You didn't need that Magnifying Glass, right? Daisy's Tote Bag is insurance against losing that hand slot to The Necronomicon. On a more positive note, it's a much better translation than the Simonomicon or whichever version was in that cabin in the woods that summons a demon horde AND you can use it's ability as a free action thanks to Daisy Walker's special ability.