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Life & fun · July 17, 2025

I Wrote a 680-Page Interactive Book on Data Structures and Algorithms

Hello HN! I’m Elias. I’ve been an educator in Engineering and Computer Science for some years, and I'm always looking for ways to make learning more engaging and hands-on. A few months ago, I started experimenting with the idea of a book that changes and evolves as you interact with it. It started with a chapter on sorting but that snowballed into a 22-chapter interactive book. My objective in writing this book, was to introduce a more interactive format for technical books that doesn't require internet access, that is lightweight, comprehensive, cross-platform, and can provide a better…

I Wrote a 680-Page Interactive Book on Data Structures and Algorithms launched on July 17, 2025 with 29 votes, #669 of 9,223 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 1 year on.

Visit cartesian.app ↗Alternativestop 7% of July 2025

In plain words

Elias created a 680-page interactive book covering data structures and algorithms across 22 chapters. The book features over 300 interactive visualizations and editable code snippets that work offline and run on any platform. Designed for students and engineers learning computer science, it emphasizes hands-on engagement over traditional text-based learning, combining theoretical explanations with interactive elements to support active learning without requiring an internet connection.

written from the facts on this page · September 2026

From the sources

Discover a unique, interactive way to master data structures and algorithms with rich visualizations, step-by-step code execution, hands-on problems, and an embedded Python coding environment—all in one immersive book.

This one-of-a-kind interactive book offers a hands-on approach to learning data structures and algorithms, featuring rich visualizations, code execution playback, an assortment of problems and an embedded Python environment. It’s designed to support both beginners and more experienced learners through active exploration and interactivity. All concepts in the book are discussed succinctly and in a manner that flows logically. Each topic is accompanied by rich interactive visualizers that let you experiment and play with. All interactive elements are dynamic and are procedurally generated based on your inputs. A playback system lets you pause, rewind and step through any part of the…from cartesian.app

In the maker’s words, at launch

Hello HN! I’m Elias. I’ve been an educator in Engineering and Computer Science for some years, and I'm always looking for ways to make learning more engaging and hands-on. A few months ago, I started experimenting with the idea of a book that changes and evolves as you interact with it. It started with a chapter on…

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