Wallets
KQ Book never holds your funds or your keys. Signing in only asks your wallet to sign a short message proving you control an address — install any one of these first.
These are the official links for each wallet. A wallet extension controls real funds, so once you've installed one from here, be wary of anyone who later messages you a different "wallet" link claiming to be an update or a fix.
Supported wallets
After installing
Reload KQ Book — extensions are only visible to a page that loaded after they did — then click Sign in at the top of any page and pick your wallet from the list. You'll be asked to sign one message. It moves no funds and gives KQ Book no permission to spend anything.