unrepresentative
🇺🇸
/ˌʌnˌreprɪˈzentətɪv/
🇬🇧
/ˌʌnˌreprɪˈzentətɪv/
Something that is not a good example of a larger group or collection, and so doesn't give a true picture of it.
This early novel is unrepresentative of her work as a whole, so don't judge her writing style based on it alone.