What buyers most often ask before they buy.
All prices are in US dollars and paid securely through Stripe by card. We never store your card number. Items are digital goods and can be downloaded as soon as payment succeeds.
Digital goods cannot be returned once sold, so please read the sample pages, contents and description before you buy.
After you sign in, everything you bought is in My library and can be downloaded again at any time, in PDF or EPUB depending on the item. A new phone or computer does not need a new purchase.
No account needed: enter your email and pay; the download link is emailed to you. Lost the link? Open /shop/retrieve and enter your email to have it sent again.
You are buying a high-resolution digital copy of a classical Chinese painting or calligraphy work. After payment we email you a download link (signed-in buyers can also download from My books). Digital goods, all sales final.
Textbooks and readers have free sample pages on the item page.
For books you own that have the feature enabled, open the book from My library and choose Ask this book; the AI answers only from that book. Each account gets 5 free questions, then US$9.9 per month, cancel any time.
Not sure where to start? Take the 12-question level test and get a recommendation.
A SID is the permanent name of an item: Title (type, creator, year). Type clavishop.com/title in the address bar to open the item page; the QR code carries its 32-character machine ID.
Just looking for one book? Type its title only, such as Hong Lou Meng; no brackets or attributes are needed.
A public machine-readable version of the catalog, SIDs and prices: llms.txt · catalog.json · sitemap.xml
Authors can publish e-books, textbooks and courseware here and order translations of the description (US$10 per language). The platform owner confirms each item's bare SID.
Tell me what you want to learn and I will pick from our shelf.