When the photocopier is done clattering, all of a sudden a girl appears before Anna who looks exactly like her ... Anna has copied herself! Is that Anna or annA? Who is the original, and who is the copy? And who are we when there is someone that looks exactly like us? Again and again, nine-year-old Anna is told that she has a vivid imagination, and most of the time the remark is not meant as a compliment. For this reason, she does not tell anyone about the self-made Gygax family who lives under her bed. Nor does anyone know about Anna's secret friend at school, a photocopier named Copy. One day, however, Copy accidentally duplicates Anna herself. What now? It doesn't take long to come up with a name for her twin sister: annA. But what will Anna's mother say? A turbulent hide-and-seek game revolving around Anna and annA begins ... A novel for children aged 9 and older about the power of imagination and the question: What defines our identity?