Dargel Solutions · Digital Products
Practical guides and playbooks with working calculators and templates. Published under Adrian Verdan, the publishing imprint of Dargel Solutions. Buy selected guides directly from Dargel Solutions, with Gumroad available as an alternative. Dargel Solutions publishes the AI Starter, the way in, for free.
The way in, no programming required: over one weekend, build your first tool of your own with an AI agent, and check it so you can trust it.
€0.00 Instant download · occasional emails about our guides and tools, unsubscribe any time
The step-by-step guide to starting a small business in Germany, from the decision to your first income-expense statement. Written in English for expats, German terms explained.
€4.90 Final price · EU consumers · PayPal
Buy direct: Start a Kleingewerbe in Germany Contents and preview →
A practical playbook for AI automation in small businesses — with an ROI calculator and working templates. Written in English.
€12.90 Final price · EU consumers · PayPal
Buy direct: AI-First Operating Playbook Contents and preview →
A practical playbook for making AI models work together — reviewer patterns, routing, research verification and cost control. The multi-agent deep dive behind the AI-First Playbook.
€12.90 Final price · EU consumers · PayPal
A logged field report from thirty-nine days of a two-agent operation, and the fifteen things counted as coverage — fourteen green lights and one unused capability — that still missed the question that mattered.
€29.90 Final price · EU consumers · PayPal
Buy direct: Nobody Opens a Passing Check Contents and preview →
Where “Buy direct” is shown, EU consumers can buy from Dargel Solutions and pay with PayPal. The displayed direct price is the final price: no added VAT or fees. The small business VAT exemption under section 19 of the German VAT Act applies. Some special territories are excluded; availability is checked at checkout. Gumroad ↗ remains available for business purchases, other locations and products offered only there. Gumroad is the seller for those purchases and shows any VAT and the final price before payment.
Updated model references and selected central registration rules are linked to dated sources. Check the applicable requirements before use.
The products disclose their use of AI. Editorial responsibility: Adrian Verdan (Dargel Solutions); for the AI Starter, Dargel Solutions. Review by agents is not human review.
Each product page includes previews or a free practical exercise, so you can see what is inside before you buy.
Our free overview explains how to register a Kleingewerbe in Germany, including typical costs, deadlines, and the small-business VAT thresholds, with direct links to official sources.
Registering a Kleingewerbe: steps, costs, and deadlines →
All four titles for sale are available in German and English — one product per language. The field report was first published in English; its German edition is Niemand öffnet einen grünen Check. More products are in the works.
Hear about new releases first: follow the imprint on Gumroad.
