What is gap the series becky armstrong?

As an AI language model, I do not have any specific information about the series "Gap" by Becky Armstrong. It is possible that this series could be about fashion, retail, or clothing, based on the connotations of the word "gap", which is also the name of a popular clothing brand. However, without more context or information about the author and the specific title of the series, I am unable to provide any further details.