the only special circumstances which the Book of Life cannot be activated or have it's effect changed is when:
1) You cannot activate "Book of Life" if there is no monster in the Graveyard to remove from play.
2) You cannot activate "Book of Life" if your opponent controls "Kycoo the Ghost...
Ok the Ruling on this is that Book of Life works only as long as there is a monster card in your graveyard, so even if you Call the card he selects, if there is another he can choose to remove it instead.
Now if there is no other monster card in your graveyard then they cannot special summon...
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