Junior Woodchucks' book capacity

[Hector]

I know that the fact that all human knowledge can fit in there is just a running
gag not even the perfectionist Don Rosa ever bothered explaining, but what
about you? Do you feel like trying to find a reasonable explanation, for the fun
of it? I can come up with two...
1. There is no such thing as a single complete version of the book. It is separated
into countless of volumes. At each journey, the kids take with them the version
about the knowledge field that has to do with their quest. Okay, that explanation
is kinda weak, for they can never precisely know beforehand all the info they
might need.
2. The book is magically charmed. Magica's existence proves that mage is a thing
in the feathery universe. What looks like the cover of an ordinary book is merely the
gate to a dimension where all human knowledge can be found. The reader can
summon, with his mind, the info he needs.

[Scrooge MacDuck]

Sept 10, 2017 19:55:41 GMT Hector said:

2. The book is magically charmed. Magica's existence proves that mage is a thing
in the feathery universe. What looks like the cover of an ordinary book is merely the
gate to a dimension where all human knowledge can be found. The reader can
summon, with his mind, the info he needs.

I'd go with "magic" as well, but not such a complicated thing as you are implying — merely, the Guidebook is enchanted to appear of normal thickness even though it has thousands of pages.

[RobbK1]

I don't like magic, and don't believe in it. The Junior Woodchucks' Guidebook must have NO well-known facts, only very obscure ones. And it has very, very thin paper, and extremely small print.

[gadgetphile]

Or as a Q&A once said. 

It's only Junior Woodchucks that reads the book. And as we all know, they're experts in abbreviations.

[Scrooge MacDuck]

Sept 11, 2017 6:18:44 GMT gadgetphile said:

Or as a Q&A once said. 

It's only Junior Woodchucks that reads the book. And as we all know, they're experts in abbreviations.

Ehhh… that doesn't really hold up to scrutiny, though. For instance, Flintheart Glomgold effortlessly (though illegally) reads from the book in Son of the Sun.