Hidden Catalogue

The secret Bobmazon book, one of the most powerful items in the whole mod.

Uses
The book can be used like any other ordinary Bobmazon book, but prices for items are almost nothing. As an example, you can buy a stack of any common raw material and a few alloys from the mod (e.g. Steel, Titanium, Tungsten, Copper, Red Copper, etc) for 2 bottlecaps. You can also buy missile crates, NTM Dirt, Atomic Science Kits, Grenade Kits, and more. As with all Bobmazon books, the currency used is Nuka Cola Bottle Caps.

How to Obtain
In order to obtain a hidden catalog, you have to do a few things: There will be answers with more characters than signs allow, just type out as many as possible.
 * Get a regular sign
 * Answer the four questions and put the answers on said sign in the same order (all lowercase)
 * Right-click the written sign

There will be no hints, so don't even try it. This wiki also will not help in this specific case.

These questions will only work for versions  after  X3461.

You'll need the Bobmazon level 6 achievement to order anything.

You can also get the book by performing the command (in 1.12.2, the "item" prefix is omitted):

#1
A collective, not known by many, not known for much, but creating the nodding horse of metal.

#2
Two of them exist, though they are rather shy. You may only see them with the luck of three die.

#3
A blind passenger on board the ship headed towards the behemoth of regolith.

#4
There's two brothers, similar names, similar looks, but who work in different departments. Both are in the top of their class, vastly superior to their peers. The older brother only has two colleagues, while the younger one has many, among which is their cousin, who also shares their family name.

What's the name of the younger brother?