The Strangest Book On Earth

Not so strange. It's just an art piece and there is lots more of that kind of thing out there. Look into early 20th century surrealism for instance. Watch the film Un Chien Andalou.

It would be more interesting if it was not trying to be a knockoff of the Voynich manuscript.

Also, some anime is like this, for instance Porco Rosso and The Wings of Honneamise. Both of them take place in alternate realities.