You can never go wrong with getting someone chocolate as a gift, and this is the perfect option for book and chocolate lovers alike.
I found this International Chocolate Bar Library on Bespoke Post's Valentine's Day guide. Wrapped like library books, each chocolate bar has a unique, global flavor that is both gluten and dairy free. Flavors include Sicilian Salted Lemon, Toasted Coconut & K-Lime Leaf, Raw Pistachio, Rosemary, and South American.
There's not really anything "Valentine's Day" about it other than the fact that it's chocolate, so I see this being a great gift for any occasion that calls for chocolate.
Check out the International Chocolate Bar Library here.