1. These are the MARC fields we currently keep in the database: 010 - Library of Congress Control Number (LCCN) | LoC No. 020 - International Standard Book Number (ISBN) | ISBN 022 - International Standard Serial Number (ISSN) | ISSN 035 - System Control Number | Ebook No. 041 - Language Code | Language 050 - Library of Congress Classification (LoCC) | LoCC 082 - Dewey Decimal Classification Number | Dewey 240 - Uniform title | Uniform Title 245 - Title Statement | Title 246 - Varying form of title | Alternate Title 250 - Edition Statement | Edition 260 - Publication, Distribution, etc. (Imprint) | Imprint 300 - Physical description | Source Description 440 - Series statement / Added Entry -- Title | Series Title 500 - General note | Note 505 - Formatted Contents Note | Contents 508 - Creation / Production Credits Note | Credits 520 - Summary, etc. Note | Summary 534 - Original Version Note | Original Version 540 - Terms Governing Use and Reproduction Note | Copyright Notice 546 - Language Note -- Uncontrolled | Language Note 600 - Subject Added Entry -- Personal Name | Subject 610 - Subject Added Entry -- Corporate Name | Subject 611 - Subject Added Entry -- Meeting Name | Subject 630 - Subject Added Entry -- Uniform Title | Subject 650 - Subject Added Entry -- Topical Term | Subject 651 - Subject Added Entry -- Geographic Name | Subject 653 - Index Term -- Uncontrolled | Subject 901 - Cover or Frontispiece Image URL | Cover Art 902 - Title Page Image URL | Title Page 903 - Verso Image URL | Verso Some fields are controlled, eg. subjects. That means you get to insert only values from a subject list approved by the LoC. Refer to the MARC docs. 2. Some of the data are automatically populated from the PG header in the posted ebook. Most of them need to be added manually after the fact. We have an online interface for that and people working on it. If you want to volunteer, speak up. (And great silence ensued ...) Alternatively I can also batch insert data into the database from a CVS file formatted thus: ebook;marc;value 12345;260;New York, 1921 12345;300;300 pages, 8x13 inches 12346;260;Chicago, 1854 3. For submissions in the RST format you can add all that data like this: .. meta:: :DC.Title: Witches :MARC.250: First Edition :MARC.260: Salem, Mass. 1692 -- Marcello Perathoner webmaster@gutenberg.org