So…my head hurts and I need to lie down from this train of thought, but let me share first.
"The Book of Briars’ was a challenge/spell/sentient tome that was given to our world every so often by the Council of 18 Gates in order to test us and challenge us to open it. At least twice before (Augie’s grandfather’s mountaineers, and the 94’s) the Storm showed up to wipe them out. A copy of “The Book of Briars” existed in each of these timelines, only to be taken back and reused by the council when the mounties were wiped out.
In 2018 our ‘Book of Brairs’ was burned and “destroyed” by the Silver, when the Council was talked into doing something different this time by Sullivan Green. Instead of saving the Book as they usually do, they saved us, trusting we’d figure it out.
Our answer was to actually convince part of the Storm (The innocent child at the center of the Storm who had the power to take things from the past in exchange for things from the present.) to take the Little Red House, and switch it with the Book of Briars from 1998. So we had a ‘Book of Briars’ again.
So at some point we ‘sent’ the storm to 1998 to get the Book of Briars and bring it forward to now, so we could open it. Is it possible this is what happened to them on the island? Perhaps the Storm had to go there to recover it?
But…then how in 2018 do they still have the ‘Book of Briars’ to release? Or is the Spell the ‘Book of Briars’ different from the physical ‘Book of Brairs’ which is different from the Age the ‘Book of Briars’? Yeah, going to lay down now.