The Hidden Levers is a nice modification that will add two kinds of hidden levers: a torch lever and a bookshelf with a masked activator book. This will allow you to make perfectly hidden entrances to the most secret places of your construction.
How to install Hidden Levers Mod
- Download and install Minecraft Forge
- Download a Mod
- Unzip it and copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods