The book · the 5D Method
Stay or Leave? The book.
"Stay or Leave?" is the 5D Method for deciding at a crossroads. You come in with a doubt that keeps you up at night. You walk out with a decision with your name on it. A method born from more than ten years of decisions taken in the field.
The Italian edition comes out in August 2026, the English edition in September 2026. One reservation form covers both: you pick your language there.
Where the book stands
The English edition comes out in September 2026.
I wrote the book in Italian first, and the Italian edition comes out in August 2026. The English edition follows in September: same method, same tools, same promise. You can already reserve either one, with the same form. Here is what you can do today.
Reserve your copy
Before release, at a reduced price, with a bonus. One form for both editions: you pick English or Italian there.
Reserve in advanceTake the free test
Ten questions to find out which of the five Ds you are missing at your crossroads. Three minutes, no email asked.
The Stay-or-Leave TestLet's have a coffee (30 min)
Free, online, no strings attached. You bring your crossroads, we look at the first move together. In English, Italian or German.
Pick a slotWhat it's about
The back cover.
It's two in the morning and you're still awake. Do I leave the secure job or stay? Do I close this chapter or try again? Do I move away or put down roots? You know the options by heart. What's missing is the choice.
This book is for anyone standing at a crossroads who no longer trusts "follow your gut" or the list of pros and cons. Donato De Tullio has stood at that crossroads more times than he would like to admit: he left Puglia in a Kia Picanto loaded up to the roof and with no confidence in himself, went through a PhD in a country whose language he didn't speak, a management career with hundreds of people, a burnout, a second one missed by a hair, and the nights when the only answer seemed to be running away. Out of those mistakes he built a method, the five Ds, which he now uses as a coach with people at a turning point.
Inside you find true stories, science translated into normal words, and one tool per chapter: the 72-Hour Test, the two-way door, the pre-mortem, the coin that doesn't decide. No magic formulas and no sunsets: one promise only. You come in with a doubt that keeps you up at night. You walk out with a decision with your name on it.
Because there is no right choice. There is your choice.
The method
Five Ds. One criterion: yours.
No lists of pros and cons: five questions in a row, and one concrete tool for every step, like the 72-Hour Test, the two-way door and the pre-mortem. A method matured over more than ten years of real decisions, to turn doubt into the instrument that guides you.
Data
Start from what is true: the observable facts, net of the stories you tell yourself.
Direction
Understand where it makes sense to move, starting from the values your choices actually protect.
Decision
Choose with a criterion of your own, give the choice a date and put your name on it.
Destination
Turn the choice into action: a precise point, a date and the first steps already written.
Desire
The engine of everything: what you actually want, how you think and how you see yourself. The hidden D, the one that holds the other four together.
Curious about the method? The five Ds explained one by one
Included with the book
The Crossroads Workbook. The whole book, in digital form too.
Every copy of the book opens its digital companion. The tools of the fifteen chapters ready to fill in, the full loop, in ten moves, that takes you from the doubt to the signature, the take-home summaries and the rule of each chapter. You fill in, save, download and print your results: everything stays on your device, no email, no account.
The access code is printed in the book, next to the QR code. The English Workbook arrives together with the English edition.
The author
Who is behind the book.
Donato De Tullio has a PhD in chemistry and more than ten years in European multinationals, leading people and projects across 6 countries. In Germany since 2014, still a manager today, and alongside that the decision partner of people building something of their own.
While you wait
Start before the book arrives.
The method already works in English: I use it in sessions every week. Bring your crossroads to a coffee, and we look at the first move together.
Want a taste of the method first? Take the Stay-or-Leave Test (ten questions, no email). Read Italian? Reserve the Italian edition in advance.