a hint
a library, just for you
for you
for her · gift studio
Write your number, or a message, and it's hidden in one book among thousands. She has to open them, one by one, to find it. The link doesn't give it away: the words are locked inside the one book they're in, and nothing says which book that is.
Leave the hint empty to make it as hard as it gets.
A product of for her — all gifts
Some apps shorten long links when they send them. Ask whoever sent this to share it again — pasting the whole link, as a plain message rather than a preview.