I was reading the mangaka’s previous work 7th Garden, out of curiosity and found some interesting things that I’m surprised no one has pointed out yet. In 7th Garden’s setting there are various continents that make up the world, one of which shares the name of the main continent that Magus takes place in, “Atlatonan”.
Chapter 6, one of the characters that’s been traveling a lot mentions “news of the great library on the new continent of Atlatonan”
Chapter 3, Alomism is stated to be a major religion of the Atlatonan continent, Magus of the Library has quite a few religious groups but I don’t believe that name has come up.
7th Garden’s Volume 2 extra has a side story that tells a tale of why their planet has two moons, which is quite curious since Magus of the Library also appears to have twin moons, Chapter 15 is the best example of them both being visible. But I also noticed them in Chapters 8, 9, 13, 14, 18, 20, 23, 24, 25, 26 and 29.
7th Garden’s Volume 2 also has a map of the setting, which shows the Atlatonan continent in relation to everything else, but it doesn’t seem to match up. According to this post by Altathing translating Mitsu Izumi's tweets about the lore of Magus, the Atlatonan continent of this setting is an island, unlike the 7th Garden version.
So unless there was some major changes in the landmass (like how those various islands fused to become the Atlatonan continent) they’re probably not the same continent.
Spoilers for 7th Garden
The world we’re first introduced to in 7th Garden is a simulated world sort of like The Matrix movie and the “real world” is a post-apocalyptic world destroyed by the “Great Sand Flood”. The current administrators of the simulated world seem to have modeled it after the real world, the map is the same and they’re orchestrating world events and history to follow how they happened in the real world. Why they would do that when the inevitable fate of that would be the state of the post-apocalyptic real world is a mystery. But my guess is, it's to basically clone the original creator behind the simulated world (who died under mysterious circumstances) through the A.I populace of the simulated world, effectively “resurrecting” her which would be interesting considering the series views on the personhood of A.I (Chapter 31).
But I digress, since one of the worlds in 7th Garden is simulated, any discrepancies with the geography could have an easy explanation.
End of Spoilers for 7th Garden
The Atlatonan continent hasn’t been featured in 7th Garden yet and the series is currently on hiatus, so there isn’t more to go off of in regards to comparing it to the version in Magus. Supposedly Magus of the Library evolved from a one-shot called “The Apprentice Librarian” which was published in Jump Square/Jump SQ the same magazine that 7th Garden ran in and that version had no supernatural elements like magic, so maybe that’s the 7th Garden version of the Atlatonan continent.
I’ve seen quite a few people lament the fact that 7th Garden will probably never get finished since the mangaka moved on to write this series. So it would be quite amusing if the series are connected and they try to finish off the story in Magus or maybe Mitsu Izumi might just be simply reusing a concept that they weren’t able to get around to in their previous work, but regardless I thought it was worth sharing.