XThe X Algorithm
Side by side

Here, or on Apple Books.

The same book, two separate purchases. This is what each one is.

thexalgorithmbook.comApple Books
Price$24.99, one time$31.99, one time
Where you readThe online reader, in any browser on any device. Also an EPUB for Apple Books, Kindle, Kobo, or any reader app.The Books app on iPhone, iPad, and Mac.
Highlights, notes, bookmarksSix highlight colors, a note on any highlight, a bookmark on any page, all listed in one panel, all private, and they carry over to the next drop.The Books app's own highlights and notes.
Your placeRemembered across every device and browser you sign in on.Remembered by the Books app across your Apple devices.
The fileAn EPUB made for you, with your name in it, replaced with each drop.Apple's copy in your Books library.
DropsTwelve months of drops from the day you buy. After that you keep the last drop you received; $19.99 adds twelve more months whenever you like. Nothing renews on its own.Every drop for as long as the book is listed on Apple Books.
How a drop arrivesThe online book becomes the new drop by itself on the 25th; the EPUB is replaced; an email says what changed.Apple updates the book in your library and shows the "What's new" notes.
Sign-inAn email link, a password you set, or Continue with X or Google.Your Apple ID.
PaymentCard, through Stripe. The card never touches this site.Your Apple payment method.
RefundsThe sale is final once the book has been opened. If it will not open at all, write within 14 days and it is fixed or refunded.Apple's refund policy, at reportaproblem.apple.com.
The licenseOne license, one reader, accepted by name before the first read. The file carries your name and a copy identifier; sharing closes the account.Apple's terms, and Apple's copy protection.
What one does not includeThe Apple Books edition.An account here, the online reader, or the site's file.
HelpThe contact form, answered by email.Apple Support for the purchase; the contact form for the book itself.
Coming to Apple Books