i tested a new world with just your mod only and my result were these particular books once read equal as unread
Books:
Magnum enforcer vol. 5,6 (AP,HP)
Great Heist Vol. 3 (although timed charge schematic is unlocked)
Ranger's Guide to Archery Vol. 2,4,5 (explosive arrows, AP Arrows, Flaming)
Pistol Pete Vol. 5,6 (AP HP)
Shotgun Messiah Vol. 2,4 (Breach, Slug)
Sniper Vol. 6,7 (AP,HP)
Schematics:
pipe bomb, grenade and contact grenade, stick of dynamite schematic
Rocket Launcher schematic
i spent this whole time trying to figure out the cause in the code but could not. again, mod works as intended and this glitch doesn't bar you from crafting or converting in any way. it is purely a visual bug on the books read or unread icon. just wanted to see if you knew about it. i thank you for taking the time to respond and for the mod itself. have a good one