Gideon by Tori Silver

In a desert hell-hole fourteen years ago Gideon Sinclair shared his dream of what his future would look like to the brothers of his heart when they all expected to die far away from home…
Now living in Florida, they are all self-made billionaires with a string of successful businesses including their exclusive BDSM club Salvation.
Which is a good cover for their other work.
Because sometimes vulnerable Little girls can get into a lot of trouble with the wrong people.
Evil people.
And only a very special type of Daddy can rescue them.