This page is available in Japanese only. The Japanese text is authoritative.

Printed books (summary): our partner printers (Lulu (United Kingdom, United States, Ireland, Belgium, Germany, Austria, Luxembourg, Denmark, Sweden, Finland, Poland, Portugal, Czechia, Greece, Hungary, Romania, Netherlands, Australia, Italy, Switzerland, Spain, France); 製本直送.com (Japan)) print and ship each copy, chosen by the destination country. The price, shipping and delivery time are shown per country on the book page. The delivery details (name, address, phone number) are given to the printer, stored encrypted and deleted 90 days after the delivery is complete. Please report a misprint, damage or a wrong book within 30 days of delivery. The Japanese text below is the official version. Printed books cannot be sent to countries other than these 23. A downloadable print-ready PDF is also sold (for Trinity Member (Monthly membership)): you can buy it and bind a copy yourself. A version with a cover can also be chosen as an option (to Japan: the paperback with a removable cover; to other countries: a cloth hardcover with a removable dust jacket). Its price, shipping and delivery time are shown on the book page. Printed books are shipped from a printer in a country near the destination. When the printer's country and the destination differ, customs duties, taxes or clearance fees may be charged on delivery and are paid by the customer. Printed books go to print right after you order, so orders cannot be cancelled, returned or refunded once placed, except where the law allows it. Misprints and damage in transit are reprinted and sent again free of charge. Paper books to Japan: printed and shipped within Japan by the Japanese printer 製本直送.com (株式会社ブックフロント, Tokyo), delivered in about 8–18 days from the order. The delivery details (name, address, telephone number) are given to 製本直送.com to print and ship the book. Orders cannot be cancelled or returned; defective or damaged copies are reprinted and sent again.

Reading offline: a saved book is kept encrypted only inside the browser of that device and cannot be taken out as a file. A save lasts 30 days and is renewed when you are online. Books you bought: any number; members’ books: up to 3 at a time. If you lose a device, remove its saves from My books on another device.

Pages of publishers' books: when you first open a page in the reader, we record the time and a sign of whether a person's input (key, touch, mouse or wheel) came just before, or whether the browser seems to be driven by a program (two small cookies, expiring after 2 minutes and 1 hour, carry the sign). We use it only to count the pages read for paying publishers and to tell automated reading apart; publishers receive only the number of pages per book and month, never who read them.