Carlos wrote the story under a penname.
Source: tatoeba (11744719)
Penname
Synonyms for "penname" (13 found)
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Sample sentences
2 total sentences available.
Nevertheless Neopythagorean treatises are extant that were written in Alexandria at the end of the first century B.C. Some of these treatises were written by women adopting as pennames the names of earlier female disciples and relatives of Pythagoras.
Source: wiktionary