@Jaime... yeah, chocolate earns a mention!
A different approach is to make the dedication book specific rather than person oriented. It's a tactic I found while I was looking through some random dedications. It's from Eats Shoots & Leaves by Lynne Truss -
To the memory of the striking Bolshevik printers of St Petersburg who, in 1905, demanded to be paid the same rate for punctuation marks as for letters, and thereby directly precipitated the first Russian Revolution
Nice one, for a book about punctuation... and clever enough to deflect any complaints from friends and relatives?