protected function cloneMetadata() {
		$metadata_post_id = ( new \Pressbooks\Metadata )->getMetaPostId();

		if ( ! $metadata_post_id ) {
			return false;
		}

		$book_information = schema_to_book_information( $this->sourceBookMetadata );

		// Cover image
		if ( ! \Pressbooks\Image\is_default_cover( $book_information['pb_cover_image'] ) ) {
			$new_cover_id = $this->downloads->fetchAndSaveUniqueImage( $book_information['pb_cover_image'] );
			if ( $new_cover_id > 0 ) {
				$this->clonedItems['media'][] = $new_cover_id; // Counter
				$book_information['pb_cover_image'] = wp_get_attachment_url( $new_cover_id );
			} else {
				$book_information['pb_cover_image'] = default_cover_url();
			}
		} else {
			$book_information['pb_cover_image'] = default_cover_url();
		}

		// Everything else
		$book_information['pb_is_based_on'] = $this->sourceBookUrl;
		$metadata_array_values = [ 'pb_keywords_tags', 'pb_bisac_subject', 'pb_additional_subjects' ];
		foreach ( $book_information as $key => $value ) {
			if ( $this->contributors->isValid( $key ) ) {
				$values = oxford_comma_explode( $value );
				foreach ( $values as $v ) {
					$this->contributors->insert( $v, $metadata_post_id, $key );
				}
			} elseif ( in_array( $key, $metadata_array_values, true ) ) {
				$values = explode( ', ', $value );
				foreach ( $values as $v ) {
					add_post_meta( $metadata_post_id, $key, $v );
				}
			} elseif ( $key === 'pb_title' ) {
				update_post_meta( $metadata_post_id, $key, $this->targetBookTitle );
			} else {
				update_post_meta( $metadata_post_id, $key, $value );
				if ( $key === 'pb_book_license' ) {
					wp_set_object_terms( $metadata_post_id, $value, \Pressbooks\Licensing::TAXONOMY ); // Link
				}
			}
		}

		// Remove the current user from the author field in Book Info
		$user_data = get_userdata( get_current_user_id() );
		$this->contributors->unlink( $user_data->user_nicename, $metadata_post_id );

		return $metadata_post_id;
	}