According to the Reddit thread, in the “Marvellous Underground Journey, Baron is inspired to travel to Russia by Don Constantino Bartolomeo Strepholofidgeguaneriusfum, or “Don, the “Master of all Masters.” From Russia Baron finds a portal which allows him to travel to other lands.
Lockwood also wrote a pamphlet called “1900: Or The Last President.” The 1896 publication describes the uproar over the election of a political outsider.
The books have helped reignite a conspiracy theory on Reddit that claims the Trump family has been involved in time travel. According to some on Reddit, Trump's uncle, John Trump, who was an engineer, was a pioneer in time travel.
The book can be purchased on Amazon and from other book retailers for around $30.