Golden branching tree, emblem of The Last Branch
The Last Branch presents

Ideas physics can't rule out.

Short, honest guides to the biggest questions in modern physics — quantum immortality, simulated realities, impossible cats — where every claim is labelled for exactly what it is.

Every claim labelled: FACT · INTERPRETATION · SPECULATION

Book I · Available now

Quantum Immortality

The idea that, in a universe that branches at every quantum event, there is always one branch where you survive.

Quantum Immortality — English edition coverInmortalidad cuántica — Spanish edition cover
AVAILABLE NOW

Quantum Immortality

A guide to understanding a fascinating idea · English & Spanish editions

In 1957, Hugh Everett proposed that the universe does not choose a single outcome — it branches into all of them. Follow that idea to its strangest conclusion and a question appears that physics has never been able to close: if there is always a branch where you survive, what does death look like from the inside? This short guide walks the idea honestly, separating what is proven, what is interpreted, and what is pure speculation.

Everywhere else: Apple Books, Kobo, Barnes & Noble & more (EN) · Spanish edition, other stores

The series grows

More branches

One idea per book. One colour per book. The same honesty system in all of them.

Are We Living in a Simulation? cover

Are We Living in a Simulation?

Book II — What if everything you call reality is code? The argument, the evidence, and what physics actually says.

MID-NOVEMBER 2026
Schrödinger's Cat cover

Schrödinger's Cat

Book III — Alive, dead… or both at once? The paradox physics still has not resolved, explained without the fog.

COMING SOON
The Last Branch emblem

Book IV

You have never seen the present. Light is slow, the past is all anyone has ever seen — and a new branch is already growing.

IN THE WORKS
The house rule

Every claim, labelled.

Most popular science blurs the line between what is known and what is guessed. These books never do. Every idea carries one of three seals:

■ FACT

Established science. Measured, replicated, and safe to build on.

■ INTERPRETATION

A legitimate way of reading the facts — one of several, and labelled as such.

■ SPECULATION

Fascinating, argued by serious people, and honestly admitted as unproven.

The author

About

Manki Branch — author emblem

Manki Branch

Author · The Last Branch

Manki Branch writes short, honest guides to the ideas at the edge of physics — the ones science can neither prove nor rule out. Each book takes a single fascinating idea and follows it all the way, separating what is known from what is merely believed.

No hype and no filler: one idea, fully explored, with every claim labelled for what it is.