U
Umbra

A curriculum, not a library

Read the dark side of influence — in the order it was meant to be read.

30 books across six categories. Each one unlocks only after you prove you understood the last. Built-in reader with bookmarks, highlights, notes, vocabulary, and adjustable typography.

Sequential mastery

Book 1 unlocks Book 2. No skipping. Real comprehension.

AI-graded quizzes

Fifteen questions after each book — pass 70% to advance.

Built for defense

Recognise the patterns. Build the boundaries. Keep your mind your own.

The six categories

01Foundations of Influence
02Dark Triad Dynamics
03Manipulation Tactics
04Interpersonal Defense
05Cognitive Reframing
06Mastery & Application