Wasn't there a secret bookcase door?

[Meowchine Gun Kitty]

I swear I saw a secret door in one of the houses but cannot find it in store. Wanted it for this bunker house to hide the bunker entrance.

[garyh2462]

It was in the Haunted Castle.

[icke]

There is "bookcase door" or "secret door" in the workshop, both made by House Doctor. Maybe that's what you are looking for.