That sounds pretty painful 
Hope they can figure out how to help you!
Awww 
I think the only thing I did was nudge you a little bit at the right moment in the right direction - and everything else was your own work! (You didn’t even ask a single language or grammar question, you know?)
It is definitely really worthwhile!
The “different levels of furigana” is certainly a Japanese thing and applies to native books as well. Especially for children’s books one can usually find editions with many or all furigana, and editions with fewer furigana. The all-furigana books are often recognizable by a green border around the cover like this:
(totally unrelated, but this is a very heartwarming story about coming-of-age, with a beautiful anime)
Sometimes the all-furigana book is somewhat different from the “regular” edition (e.g. in Kino no Tabi they left out a full chapter iirc). Also of course the contents per page usually varies across different editions (which is a nightmare to keep track of in bookclubs 
).
But having different phrasings indeed seems to indicate different translations. According to the book’s Wikipedia page 星の王子さま - Wikipedia there’s indeed a gazillion of them, but only very few audio recordings, as it seems.
Yes, the cover on mine looks identical.
I recently read a short story that is also available on Youtube where it is being read by a voice-actor. The story is about 40 pages and the video is about 50 minutes. 
He reads the story so fast that I cannot even follow with my eyes 
let alone read and understand anything… So, still way to go, for me as well.
I think I’m generally less affected by task switches than many other people I know. It even occasionally happens that I stop reading in the middle of a sentence (especially when reading harder books), and I can usually get back to it the next day without issues.
Also, for my sauna reading it turns out that I can read one of those 4-5 page chapters pretty much exactly in the 20 minutes that I usually take to rest between sauna rounds, so that’s a really good fit as well.
I’ll try to be more mindful when grading anything in the 20s. I definitely don’t want to frustrate people by badly leveling them.
). It’s really a love-hate relationship, like every time I start I feel like “omg this is so dense, I’m never gonna get through this” but then I finish that section and get sucked into some nonsense or emotions and suddenly it’s three pages later - there’ve been multiple days where I’ve completely missed my normal wk review time wading through it without even realizing 
…It’s already past bed time now tho, has been kinda busy today ehehe oopsies 
