It’s probably because of the publisher’s stance toward eBooks in libraries via Overdrive.(Chart of authors and their publishers.)
If you’d like to see more downloadable eBooks available in libraries, please contact publishers who impose limitations on eBook downloads to libraries to give them your feedback.
These publishers have never allowed eBooks to be distributed to libraries via Overdrive.
Macmillan Publishing
75 Varick Street
New York, NY 10013
(212) 226-7521
customerservice@mpsvirginia.com
Simon & Schuster
1230 Avenue of the Americas
New York, NY 10020
(212) 698-7000
http://simonandschuster.com/about/contact_us
Hachette no longer offers eBook titles to libraries via Overdrive.
Hachette Book Group
466 Lexington Avenue #131
New York, NY 10017
(212) 364-1100
customer.service@hbgusa.com
Penguin Group no longer offers eBook titles to libraries via Overdrive. Previously purchased titles may no longer be transfered wirelessly to devices like WiFi enabled Kindles.
Penguin Group
375 Hudson Street
New York, NY 10014
(212) 366-2000
ecommerce@us.penguingroup.com
A Harper Collins library eBook license expires after 26 checkouts (effectively giving popular titles a one-year shelf life).
HarperCollins Publishers
10 East 53rd Street
New York, NY 10022
(212) 207-7000
Brian.Murray@harpercollins.com (CEO of HarperCollins Publishers)
Some information in this post used courtesy of Sarah Houghton-Jan, blogger and director of the San Rafael Public Library (CA) from her February, 2012 blog entry.