Normally, linkbooks can only take you to a different dimension. Trying to link to someplace in the overworld from another place in the overworld normally fails, right?
Linkbooks have things called modifiers. Think of them like TiC modifiers, but for linkbooks.
One of the modifiers is called Intralinking. It allows the affected linkbook to work even when it's linking within the same dimension. That way, you can have a linkbook to take you from one overworld base to the other without having to make a stop in the Nether/Twilight Forest/Promised Land/Aether/Limbo/Mining Age #86.
Following is a modifier that makes the affected linkbook stay in your inventory after being used instead of dropping on the ground. If you have a Following Linkbook to your base, you have a permanent "Go Home" teleporter that doesn't need to be placed in a book stand or abandoned after a single use. Unfortunately, it isn't currently possible to get the Following modifier without cheating.
The only other remotely interesting modifier is Disarm, which makes whoever uses the linkbook drop their entire inventory onto the floor and arrive at their destination buck naked. If you're the pranking type or playing in a hardcore PvP/anarchy server, you can make a Disarming linkbook and give it some enticing label like "Iridium Plate Storage" and give people a nasty surprise.
Anyways, with the ink mixer, you can throw special ingredients into the ink which will give the resulting link panel a chance of having certain modifiers. For example, tossing 10ish silver dust into the ink mixer gives you a pretty good chance of getting an Intralinking Panel without having any other unwanted modifiers.