Be a Gajillionaire in Three Days! is a book which exists in the 2017 Continuum.
A thick leather-bound book, Be a Gajillionaire in Three Days! is supposedly a guide to wealth and riches", most likely an encyclopedia of get-rich-quick schemes. The book is illustrated with copious dollar sign motifs and several pictures of its purported author Scrooge McDuck (though it is likely it was merely published in his name, as such an endeavor would be quite uncharacteristic of Scrooge).
Scrooge's grandnephew Louie Duck owns a copy of this book, and, upon reading it, was naturally fascinated.
Behind the scenes
This book was only ever seen in the 2018 promotional short 30 Things With Louie.