Skeptics, take it for what you will, but I had a synchronicity occur while reading this book.
Halfway through the text, I went to visit my brother, and was telling him about synchronicity. How, for me, they often occur when a customer comes into my store. The customer talks about a random subject, such as burning themselves on a curling iron or quoting a Bible passage. Then, when they leave, I return to whatever unrelated book I'm reading, only discover the next sentence mentions "curling iron" or the next page mentions the exact Bible passage (from Job in that case).
While I'm telling my brother this, he's watching a video on YouTube that introduces a new character to a video game, Smash Bros. Ultimate. This character, called the Joker, wears a mask. When removed, he yells "Persona!", and a shadow monster appears behind him.
I leave, and return to reading the book. On page 105, 1st edition, it details Carl Jung and his terms, shadow (meaning our (sometimes) hidden self), persona (our outward self we show the world, named after "the masks worn by actors in ancient Greek dramas"), and how the "Trickster acts on behalf of an unconscious structure known as the shadow".
When I return to my brother's house the next day (04/17/19) to tell him about it, he is busy attempting to download the Joker character.