Tactics Treatise loose Moral

[iregev]

Do you know why the Tactics Treatise (that diary that gives you 10% EXP) loose Morale ?
How do I make it gain morale except supress

[jwallstone]

Every time you fight a battle while having fewer than 5 might runes, the book loses morale. There is no way to make it gain morale except to suppress it when it gets low.