ISBN should create edition item, not book
Issue #17
new
According to Wikidata:WikiProject Books, ISBN is only for editions (Q3331189), not books (Q571). So sourcemd should create items with P31=Q3331189, not P31=Q571. Thanks.
Looks like this is now resolved by https://bitbucket.org/magnusmanske/sourcemd/commits/385b42edf24d3e54d6d651502ec0b4cec7fa274a