- Instant online access to all current and back-issue content via our website/HTML edition
- 4 issues per year, averaging 112 pages each
- Satisfaction guaranteed: Cancel anytime for a full refund on remaining issues
Free shipping of print subscriptions within the U.S.; $15 to Canada or Mexico; $20 to all other destinations
New print issues of TOS are published and initially mailed in mid February, May, August, and November; new online, ebook, and audio versions are available by the 20th of these months. If you purchase a print subscription after the initial mailing of the current issue, your copy of the current issue should arrive within two to three weeks.
Subscriptions commence with the current issue. (If you prefer another arrangement, please email us.) New issues are published on the 15th of February, May, August, and November and remain the current issue until the publication of the next issue.
Questions? Please contact us if you have any questions about TOS subscriptions.
To give a gift subscription, click here.
We accept Visa, MasterCard, Discover, and American Express.
Kindle users have two options: (1) subscribe directly through TOS via our E-book subscription and download your files (MOBI/PRC or PDF) from TOS's website; or (2) subscribe through Amazon, in which case Amazon, not TOS, manages your subscription and delivers your files.
Back & Single Issues
Back issues are available online (via our website/HTML edition) with any subscription purchased directly through TOS. We do not offer online access to individual issues apart from a subscription.
While supplies last, single and back issues of the print edition can be purchased here.
An E-book subscription includes access to EPUB, MOBI/PRC, and PDF
versions of TOS. The EPUB and MOBI/PRC formats offer "reflowable,"
resizable text and work with a variety of devices. When used with
appropriate software, the EPUB format works with laptop and desktop
computers, the Apple iPad and iPhone, the Barnes & Noble Nook, and the
Sony Reader. The MOBI/PRC format works with Kindle devices and
software. (Note: Kindle users may also opt to subscribe to TOS
directly through Amazon.) The PDF version is a non-reflowable digital
replica of the print journal and may also be viewed on a variety of
In addition to EPUB and PDF versions of TOS, an E-book subscription includes access to the website edition of TOS, including all back-issue content. The website edition can be accessed by logging in to our website and browsing the categories in the left-hand column.
To purchase an institution or library subscription, click here.