A written document (hereinafter referred to as a “work,” on electronic format which includes, stories, novels, education texts, biographies, compilations, collections, anthologies, tracts, and any other traditional format for relatively extensive texts) provides access to reference, bibliography and / or definition material through an electronic software capability associated with the work. Depending upon reader access information or characteristics (e.g., age, grade, proficiency, or position within the work or any other identifiable reader characteristic or access limitation), any request for reference material, definitions, explanations, translations, or other material provided in the associated software capability is automatically limited by system acknowledgement of the reader access information or characteristics. As the reader's access information or characteristics change, the quality and / or quantity and / or format of requested information with respect to a work changes.