Sébastien Lessard
Three books · Paperback & Kindle
The series

You know how it works.
Do you know why it works that way?

Manuals teach procedure. They tell you what a system does and which switch to press. They almost never say why it must work that way — and without the why, the knowledge stays fragile: memorized, not understood.

Three books for the pilot who already knows how to fly. The wing, the engine, and the airplane — rebuilt from the physics up, in plain language. Written by a working captain.

Understand the Jet You Fly

The series

Start anywhere. Each book stands alone.

★★★★★ 5.0 across 10 reviews on Amazon

Cover of The Wing You Fly by Sébastien Lessard: a wing seen through a cabin window at sunrise.
Book One · Aerodynamics

The Wing You Fly

Aerodynamics and Performance for the Pilot Who Already Knows How

The lift you were taught in ground school was a simplification, and you have probably suspected as much for years. This is the refresher that replaces it — angle of attack, drag, the region of reverse command, the numbers behind every speed you fly — in plain language, with no formulas to work through.

Buy on Amazon 393 pages · Paperback & Kindle About this book →
Cover of The Parcel of Air by Sébastien Lessard: streams of blue and gold light drawn through a jet engine.
Book Two · Powerplants

The Parcel of Air

Understand jet engines like you’ve never before

One parcel of air, followed from first contact with the inlet to final release out the back. Everything that happens to it on the way — compression, combustion, expansion, thrust — happens in order, and in words you already own.

A jet engine does not burn all the air it swallows. Most of it never meets a flame at all.

Buy on Amazon 121 pages · Paperback & Kindle About this book →
Cover of Boeing 787 Dreamliner: A journey across the systems by Sébastien Lessard: a schematic planform of the airplane in gold on navy.
Book Three · The airplane

Boeing 787 Dreamliner

A journey across the systems

Electrical, hydraulic, fuel, engines, pressurization, fire, ice, landing gear, flight controls. Taken apart system by system and rebuilt in your mind, always answering the one question a manual never does: why must it work this way?

The airplane becomes a city. Its generators are the power plants on the outskirts, its buses the streets carrying current downtown. Plug in one external power cart and you have built a single highway into that city — but half the workers cannot get to work, and half the town stays dark.

Buy on Amazon 367 pages · Paperback & Kindle About this book →
What makes them different

Three rules, kept in every chapter

01

Not a single diagram

Every system is built in words alone. Nothing to decode, nothing to flip back to — so the book can be read cover to cover in a hotel room, instead of consulted like a manual.

02

Why, not what

Your manuals already cover what the system does. These books cover the physics underneath it, until the procedure stops being something you remember and becomes something you could have predicted.

03

Written from the seat

Not by a journalist, not by an engineer who has never flown the line. By a captain currently in command of the airplane he writes about.

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The author

Sébastien Lessard

Over thirty years in the cockpit, the most recent of them in command of the Boeing 787.

He writes the books he wanted when he was learning. A surprising amount of how a jetliner works turns out to be different from what it seems.

The books are plain-spoken, rigorous, and grounded in the physics beneath every procedure. He takes a system apart and rebuilds it in your head with analogies drawn from ordinary life — things you already understand — until the machine stops being something you memorized and becomes something you can watch working in your mind. There are no diagrams: every explanation is built in words alone.

He flies the airplanes he writes about.

Before you buy

Questions

Who are these books for?
Airline pilots, type-rating candidates, and anyone flying a modern jet who wants the understanding underneath the procedures. They assume you already know how to fly. They do not assume you remember the physics.
Do I need to fly the 787 to read them?
Only for book three. The Wing You Fly and The Parcel of Air apply to any turbine aircraft — the wing and the engine work the same whatever the type on your licence.
Why are there no diagrams?
Because a diagram lets you believe you understood something you only recognized. Building each system in words forces the explanation to be complete, and lets the book be read straight through like any other book.
Which one should I start with?
Whichever matches what you are curious about today. They are numbered for order, not for dependency — each one stands alone.
Are they available in print?
Yes. All three are sold on Amazon in paperback and Kindle editions.
These books explain how and why. They carry no operational authority: always verify against your operator’s FCOM, FCTM, AOM and current procedures, which are the only official sources.