The Sleepwalker: Book 9

The individual or group credited with creating the main content of a product, such as a book, film, or other creative work. The value is a free‑text string representing the name(s) of the primary creator.

The natural language in which a book’s content, text, and user interface are presented or available. It indicates the main linguistic context for readers and is used to filter or display books in that language.

The country where the book was published or first released. This attribute indicates the geographic origin of the edition and can be used for filtering, sorting, or displaying regional information to customers.

The pixel dimensions of a display or image, expressed as width by height (e.g., 1920x1080). It indicates how many pixels are used to render the visual content and is commonly used for monitors, TVs, smartphones, cameras, and digital images.

Indicates the physical or digital format in which a product is presented, such as "Hardback", "Paperback", "DVD", "Blu‑ray", "Vinyl", or other media types. The value may contain multiple comma‑separated items to represent combined attributes (e.g., "Hardback, Illustrated").

A unique identifier assigned to books and other printed publications, typically consisting of 10 or 13 digits. It may include hyphens for readability but is treated as a string value. The ISBN uniquely identifies a specific edition of a title across the publishing industry.

The city, town, or region where a product was first published, released, or made available to the public. It typically includes geographic identifiers such as city names, state or province abbreviations, and country names, and may also contain postal codes or other location details.

The date on which the product was first made available to the public or released for sale. It is expressed as a calendar date in year‑month‑day format (YYYY-MM-DD). This attribute helps users identify the time period of the product’s availability and can be used for sorting, filtering, or determining relevance based on release era.

Indicates the intended reading level or age group for a book, often expressed as a numeric rating or alphanumeric code (e.g., "5", "Young Adult / Code: C"). The value helps readers and parents choose books appropriate to their comprehension skills or age.