#1 New York Times bestseller every week of 2025
A life-changing tool millions of people can't stop talking about.
A simple mindset shift that helps you stop trying to control everything, and everyone. Hardcover, 336 pages.
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Koda
On every order, no minimum
Return within 30 days in original condition
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Bundles compared
Buy more, pay less.
Most readers end up handing their copy to someone. The discount is applied automatically at checkout — no code needed.
What's included
What arrives at your door.
One hardcover, packed properly, with everything you need to actually use it.
The hardcover edition
336 pages, Hay House, English. The full edition — not an abridgment or summary.
Eight practical frameworks
One per life area: stress, opinions, comparison, friendship, motivation, support, love, work.
The research behind it
Grounded in psychology, neuroscience and relationship research, with the sources cited.
Careful packaging
Packed to arrive in good condition. If something is wrong when it lands, tell us and we will sort it out.
30 days to decide
Changed your mind? Return it within 30 days in its original condition for a full refund.
A real person on support
Email us and a real person replies — no bots, no ticket queue.
Ratings
How readers rate the book.
Average reader rating across all editions of The Let Them Theory, as reported on Goodreads. Koda has not collected its own customer reviews yet.
FAQ
Questions, answered.
How is the bundle discount applied?
Pick your bundle above and the price updates automatically — 17% off two copies, 28% off three. There's no code needed, and the discount is already reflected in the cart total.
Do bundle copies have to ship to the same address?
Get in touch after you order and we will see what we can arrange.
Which edition am I getting?
The full hardcover edition, not an abridgment or summary.
How long does delivery take?
Delivery typically takes 6-15 days. You'll get a tracking link by email as soon as your order ships.
Can I return it if it isn't for me?
Yes — request a return within 30 days of delivery. The book needs to be unread and in its original packaging.
Is my payment secure?
Yes, all payments are encrypted and processed securely through Shopify.