By Gergely Orosz, the author of The Pragmatic Engineer Newsletter and Building Mobile Apps at Scale
Navigating senior, tech lead, staff and principal positions at tech companies and startups. An Amazon #1 Best Seller. New: the hardcover is out! As is the audibook. Now available in 6 languages.
In the vast ocean of webtoons and manhwa, certain titles go viral not just for their art style, but for their psychological grip on the reader. One such name that has been circulating in Spanish-speaking fandoms and international forums alike is "Un Guia Peligroso" (known in English as A Dangerous Guide or The Guiding Hazard ).
The Spanish keyword "un guia peligroso" has over 50 million views on TikTok hashtags, and for good reason. It captures the terrifying thrill of being desired by someone who could destroy you—and the strange power of being the only one who can save them. After reading dozens of chapters and fan discussions, one thing becomes clear: the true danger in Un Guia Peligroso is not Kang Do-jin’s fists or fire. It is the hope that Seo-ah can change him. It is the reader’s own addiction to the push-and-pull of fear and fascination. un guia peligroso manhwa
So, if you decide to pick up this manhwa, do so with your guard up. Let the beautiful, terrifying panels wash over you. But remember the warning in the title: This is a dangerous guide. In the vast ocean of webtoons and manhwa,
The keyword is apt. This is not a guide who shows you the path. This is a guide who becomes a weapon. Most manhwa male leads are brooding but ultimately redeemable. Kang Do-jin, however, earns the title of "peligroso" with every chapter. 1. Psychological Instability Do-jin suffers from "Esper Psychosis"—a condition where his powers corrode his emotions. He feels nothing but rage and possession. When Seo-ah soothes his mind, he becomes addicted to her presence, not as a lover, but as a drug. 2. Lack of Moral Compass Unlike typical anti-heroes, Do-jin has no problem committing atrocities. He threatens, manipulates, and even harms secondary characters to keep Seo-ah by his side. His love is not tender; it is a cage. 3. Unpredictable Violence The manhwa’s action scenes are brutal. Do-jin destroys enemies (and sometimes allies) with a smile. The Spanish phrase "un guia peligroso" perfectly captures the duality: he is the guide’s protector, but also the greatest danger to her heart and freedom. Reader warning: This manhwa contains themes of stalking, coercion, and dubiously consensual relationships. It is rated for mature audiences. The Female Lead: More Than a Victim? A common critique of the "dangerous guide" trope is that the female lead becomes a passive object. Un Guia Peligroso attempts to subvert this, though with mixed results. It captures the terrifying thrill of being desired
This article will serve as your complete guide to Un Guia Peligroso —exploring its plot, characters, why it has become a cult phenomenon, and where its dangerous allure comes from. At its core, Un Guia Peligroso is a dark fantasy manhwa set in a world overrun by monsters, dungeons, and corrupted energies. However, unlike Solo Leveling or Tower of God , this story focuses on a specific hierarchy: Espers (psychic warriors who fight monsters) and Guides (rare individuals who can stabilize the Espers’ sanity).
The book is separated into six standalone parts, each part covering several chapters:
Parts 1 and 6 apply to all engineering levels: from entry-level software developers to principal or above engineers. Parts 2, 3, 4 and 5 cover increasingly senior engineering levels. These four parts group topics in chapters – such as ones on software engineering, collaboration, getting things done, and so on.
This book is more of a reference book that you can refer back to, as you grow in your career. I suggest skimming over the career levels and chapters that you are familiar with, and focus reading on topics you struggle with, or career levels where you are aiming to get to. Keep in mind that expectations can vary greatly between companies.
In this book, I’ve aimed to align the topics and leveling definitions closer to what is typical at Big Tech and scaleups: but you might find some of the topics relevant for lower career levels in later chapters. For example, we cover logging, montiroing and oncall in Part 5: “Reliable software systems” in-depth: but it’s useful – and oftentimes necessary! – to know about these practices below the staff engineer levels.
The Software Engineer's Guidebook is available in multiple languages:
You should now be able to ask your local book shops to order the book for you via Ingram Spark Print-on-demand - using the ISBN code 9789083381824. I'm also working on making the paperback more accessible in additional regions, including translated versions. Please share details here if you're unable to get the book in your country and I'll aim to remedy the situation.
I'd like to think so! The book can help you get ideas on how to help software engineers on your team grow. And if you are a hands-on engineering manager (which I hope you might be!) then you can apply the topics yourself! I wrote more about staying hands-on as an engineering manager or lead in The Pragmatic Engineer Newsletter.
I've gotten this variation of a question from Data Engineers, ML Engineers, designers and SREs. See the more detailed table of contents and the "Look inside" sample to get a better idea of the contents of the book. I have written this book with software engineers as the target group, and the bulk of the book applies for them. Part 1 is more generally applicable career advice: but that's still smaller subset of the book.