Add the following Tomes to the list in Rule 2.7.1:

The Path of the Lost One (2 copies)
This tome cannot be Filched.
Posess
Circumstances:This spell may be cast often if there exists a non-Lost Student, and the Student casting this is Lost, has a Mythos greater than 4 and a Sanity greater than -100
Consequences:The Student casting this makes a comment in the GNDT saying “Posess XXX DICE5”, where XXX is the name of a non-Lost Student (the Victim).  If the result of the DICE roll is a 5, the caster loses 40 Sanity, and has eir name removed from the Lost List, and the Victim has eir name added to the Lost List.  Otherwise, the caster loses 20 sanity and half eir Mythos (round final Mythos down) and the Victim loses 5 Sanity and gains Mythos equal to the amount the Caster lost.
Memory Thief
Circumstances: This spell may be cast often if the Student casting it is Lost and has a Sanity greater than -100.
Consequences:  The Student casting this gains 1 Mythos and loses 5 Sanity.  Another Student loses 1 Mythos and 2 Sanity.
Tormented Spirit
Circumstances: This spell may be cast at any time if the Student casting it has a Sanity between -100 and -150.
Consequences: The Student casting this spell loses 5 Sanity.  A Student of eir choice loses 2 Sanity.  All Students carrying a tome with a title containing “Soul Magic” lose 1 Sanity.

Book of Fire(2 copies)
Fireball
Circumstances:The Student casting this spell has not taken any action to decrease eir Thirst in the last 96 hours(4 days).
Consequences:The caster’s Thirst is increased by 15, and e may not take any action to decrease eir Thirst in the next 96 hours.  E choses a Tome and a Student.  That Student loses eir copy of that tome, if e has one.
Sunstroke
Circumstances:The Student casting this spell has not taken any action to decrease eir Thirst in the last 96 hours(4 days).
Consequences:The caster’s Thirst is increased by 3, and e may not take any action to decrease eir Thirst in the next 96 hours.  Another Student’s Sanity is lowered by 3 and that Student’s Thirst is increased by 2.
Firestorm:
Circumstances:This spell may be cast if the Student casting this has a copy of the Book of Fire.
Consequences:The Student casting this spell gains 5 Thirst, loses eir copy of this Tome and may not take any actions to decrease eir Thirst for the rest of the Dynasty.  For each instance of a Tome copy in the GNDT,  e makes a comment “XX’s YY DICE2” where YY is the name of the Tome and XX is the name of the Student holding a copy.  If the result of the DICE roll is a 1, that Student loses eir copy of that Tome and the number of copies of that Tome in the Ruleset is permenantly reduced by 1, to a minimum of 0.