Dargel Solutions · Digital Products
Practical guides and playbooks with working calculators and templates. Published under Adrian Verdan, the publishing imprint of Dargel Solutions. Gumroad handles the sale and payment.
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 € excl. VAT
A practical playbook for AI automation in small businesses — with an ROI calculator and working templates. Written in English.
12.90 € excl. VAT
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 € excl. VAT
All prices in this section are net prices. VAT depends on your country; the final price is shown at Gumroad checkout before purchase. Merchant of Record: Gumroad.
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). Review by agents is not human review.
Real excerpts and working calculator demos instead of marketing claims. You 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 three titles are available in German and English — one product per language. More products are in the works.
Hear about new releases first: follow the imprint on Gumroad.
