42: The AI Builder’s Stack
22 chapters. Zero to deep on every tool. Terminal setup, database architecture, deployment pipelines, agentic workflows, voice AI, code review automation, and the geopolitics most guides won’t touch. Real configurations, real benchmarks, real opinions from a practicing CEO running a boutique engineering studio. No sponsors, no affiliate links. Free chapter excerpts at eltexsoft.com. The book goes further.
Advance praise
“I feel like this book is the 2026 guide to going from zero to a human supercomputer.”
— Riley Davidson, Engineering Manager at Instacart
“A hands-on guide that speaks the language of real developers building real systems.”
— Richard Cave, Senior Software Engineer at VSCO, formerly Engineering Manager at Apple
“A rare book for two readers at once: it makes non-coders dangerous enough to prototype, and gives coders a fast on-ramp to AI-native building.”
— Ben Fisher, AI Product & Engineering at SKINNY&bald
“For founders who want to stop playing with AI and start building. You’ll learn which tools matter, where they break, and what still shouldn’t be delegated.”
— Ivan Bercovich, Operating Partner, ScOp Venture Capital
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About the Author
Dennis Vorobyov
Dennis Vorobyov is the CEO and co-founder of EltexSoft, a boutique software engineering studio he built from scratch in 2015 to a team of 35–50 engineers. EltexSoft has shipped 100+ projects for clients from early-stage startups to Fortune 500 enterprises, with teams in the United States, Portugal, and Ukraine.
He moved his family to Lisbon and reorganized operations while Russia’s full-scale war on Ukraine was ongoing in 2022. By mid-2023 he had reworked about 90% of the company’s workflows around AI. This book is what he learned.
About the Press
Sub-Etha Press
Sub-Etha Press is an independent publishing imprint for practitioners who build. We believe the best technical books are written by people who use the tools every day, not by journalists covering them from the outside.
The name is a nod to Douglas Adams, whose Hitchhiker’s Guide imagined a galaxy-spanning network called the Sub-Etha. We liked the metaphor. Sub-Etha Press is not affiliated with or endorsed by the Douglas Adams estate.
Press inquiries, review copies, and foreign rights:
hello@subethapress.com