Codex Mysterium
The following errata were identified in the initial version of the Codex Mysterium book (distributed before May 1st 2020). None break the actual puzzles, however they make it slightly harded to identify the correct solution. These issues were corrected in later prints of the book:
Puzzle 22
A misprint occurred in the example on the left hand page. The strip “= + = +” should have read “= + = -“, such that the line “6 = 8 + 2” reads “6 = 8 – 2”.
However this does not affect the actual puzzle on the right hand page.
Puzzle 45
There should have been a direct arrow from Vindobona to Massilia, skipping Mediolanum.
Puzzle 51
The clue should refer to “Solution 41” instead of “Solution 51”.