Terms & Conditions
1. About these terms
By paying for and downloading an e-book from Roori eBooks, you agree to these terms. If you do not agree, please do not purchase.
2. The product
The product is a digital PDF e-book of about 66 pages. No physical item is sent. This is a Preview Edition: the Python chapter contains code that was run and tested. The TypeScript/Node.js, C#/.NET, Java/Spring Boot, PHP/Laravel, Dart/Flutter and Go chapters contain verified package and version information and architecture guidance, but not tested code. Information is as of 19 October 2026 (the research date stated in the e-book). Software versions change quickly, so check current official documentation before relying on it.
3. Price and payment
Prices are in Indian Rupees (INR) and shown at checkout. Payments are processed by Razorpay; we do not store your card, UPI or bank details. A struck-through price on this site is the regular price of the e-book. A launch offer of 80% off (currently ₹98 instead of ₹499) is available for a limited period; you pay the price shown at checkout.
4. Delivery
After successful payment, the download link is shown on the confirmation page and sent to the email you provided. Please enter a correct email address. If you do not receive the file, contact support with your Razorpay payment ID.
5. Licence and permitted use
We grant you a personal, non-exclusive, non-transferable licence to read the e-book and to use its code examples in your own projects, subject to any licence notice inside the e-book. You must not resell, share, publish, upload, rent or distribute the e-book (in whole or in part), remove copyright or branding, or present it as your own work. Copyright remains with Roori eBooks. Third-party names, packages and trademarks belong to their owners and are used only for identification. The e-book is independent and not endorsed by them.
6. No guarantees
The e-book is for learning. We do not guarantee any particular result, including skill level, learning time, employment, salary, project success or business income. The e-book is provided “as is”. Code examples are educational and must be reviewed, tested and secured by you before production use. The e-book is not legal, financial or compliance advice.
7. Refunds and cancellation
Because this is a digital product delivered instantly, we do not offer refunds after the file has been downloaded, except as below or where required by law. We will refund or fix the problem if: (a) your payment was successful but you did not receive the file and we cannot deliver it; (b) the file is corrupted or unreadable and we cannot supply a working copy; or (c) you were charged twice for the same order. Contact support within 7 days of payment with your payment ID. Approved refunds go to the original payment method; timing depends on your bank or payment provider.
8. Support
Use the support contact shown on the secure Razorpay payment page. Support covers delivery and access issues, not personal tutoring or debugging of your own projects.
9. Updates and later editions
Later editions may be sold separately. No free updates are promised for this edition unless announced on this site.
10. Privacy
See our Privacy Policy.
11. Limitation of liability
To the extent allowed by law, our total liability for any claim connected to the e-book is limited to the amount you paid for it. We are not liable for indirect or consequential loss, loss of data or loss of profit.
12. Changes
We may update these terms. The terms shown at the time of your purchase apply to that purchase.
13. Governing law
These terms are governed by the laws of India, subject to any rights you have under consumer protection law. Please contact us first so we can try to resolve your complaint.