Diablo 1 HD Hellfire Mod | Awake

When i click that the map and go to new map.
I kill all monster and open all chest and barrels , open new level.I go down , in this lv have 3 places where have books only ,dont open the new way,
So how do i make this quest?

Sorry , i saw 4 secret hole . the colour is not good, i very hard to see the hole.
Thanks all guy to read
hehehe