About Addendum

 Hello, and welcome to Addendum Books! We are an independently owned bookstore in St. Paul, Minnesota. We specialize in young adult literature, though we also carry many wonderful middle grade and picture books

We are:

Marcus Mayer, co-owner

Marcus worked as a librarian and a teacher, as well as a bookseller at three independent bookstores in the Twin Cities, before opening Addendum. Marcus has been involved with various children's and young adult literature awards committees and boards, including the Kerlan and the Minnesota Book Award for both the Children's Literature and Young People's Literature categories. He is currently on the board for the Minnesota Youth Reading Award as part of the new Star of the North picture book award. When Marcus isn't working you will find him reading, running, or writing. 

Special thanks to Studio 306 for the photo.
Katherine Warde, co-owner
Katherine has her master's degree in elementary education, and worked as a teacher, tutor, and nanny (among other jobs) before opening Addendum.  She owns her own photography business, and does most of the event photos for the store. Her photographs have appeared in such publications as Publishers Weekly, Shelf Awareness, and School Library Journal.  When she's not working, crafting, or behind the camera, you will pretty much always find her with her nose in a book.  

If you would like to use any of our event photos, please email us at: addendumbooks [at] gmail [dot] com. Thank you!


  1. Thanks so much for your efforts on behalf of the event in Red Wing. It was great fun to meet you both and I look forward to more stories from the Indy Book Store front lines. Best of luck and I loo forward to visiting on my next visit!
    -Mark Fearing

  2. Keep driving by waiting to see you in the new store and lavish you with neighbor-gifts. Best of luck getting books on those shelves soon!

  3. Recommended read:
    Local author;

    DURING WORLD WAR II, the Japanese forced 200,000 young Korean women to be sex slaves or “comfort women” for their soldiers. This is one woman’s riveting story of strength, courage and promises kept.
    In 1943, the Japanese tear young Ja-hee and her sister from their peaceful family farm to be comfort women for the Imperial Army. Before they leave home, their mother gives them a magnificent antique comb with an ivory inlay of a two-headed dragon, saying it will protect them. The sisters suffer terribly at the hands of the Japanese, and by the end of the war, Ja-hee must flee while her sister lies dying. Ja-hee keeps her time as a comfort woman a secret while she struggles to rebuild her life. She meets a man in North Korea who shows her what true love is. But the communists take him away in the middle of the night, and she escapes to the South. There, she finally finds success as the country rebuilds after the Korean War. However when her terrible secret is revealed, she’s thrown into poverty. In the depths of despair, she’s tempted to sell the comb with the two-headed dragon that she believes has no magic for her. Then one day she discovers its true meaning and her surprising heredity. And now she must find the only person who can carry on the legacy of the two-headed dragon… someone she abandoned years ago.
    Set within the tumultuous backdrop of 20th century Korea, Daughters of the Dragon by Mayhaven Award-winning author William Andrews will make you cry and cheer for Ja-hee. And in the end, you’ll have a better understanding of the Land of the Morning Calm.
    Daughters of the Dragon is inspired by The Kite Runner, by Khaled Hosseini, Memiors of a Geisha by Arthur Golden, the books of Amy Tan and Lisa See.
    ISBN: 978-0-9913958-5-9
    LLC: 20149000030
    Publisher: MADHouse Press, LLC
    Pub Date: 10 Jan 2014


  4. Hi guys!

    I'm a local Cartoonist and creator of the syndicated comic strip Best In Show. I've recently written a children's chapter book based on the characters and I'm in the process of marketing it. I just discovered your bookstore and had to contact you! Would you be willing to have a look at a copy in consideration for a space on your Local Authors shelf? I would love to send a PDF copy for your review as the hard copies are in production (and should be in hand soon!) Please let me know your thoughts!

    Thanks so much!

    Phil Juliano
    Cartoonist and Humorous Illustrator