Book and O Unknown are very similar; both have Sandalwood, Black Tea and Musk. Book leans more woody, while O Unknown leans iris. O Unknown is more of an evening scent.
Longer lastingO Unknown
Stronger projectionO Unknown
Better perceived valueO Unknown
More of a night scentO Unknown
Accords
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AccordA blend of notes the nose perceives as one unified smell - like a chord made of musical notes.More in Learn →
ProjectionHow far the scent radiates from your skin while you stand still. The 'sillage / projection' votes on fragrance pages blend the two, so read them as overall reach.More in Learn →