
In "The Rules of Contagion," epidemic expert Adam Kucharski reveals why things - from diseases to misinformation - spread. Named among "Best Science Books of 2020" by major publications, this timely guide sold 18,000 hardbacks during lockdown. What invisible patterns connect pandemics to viral tweets?
Feel the book through the author's voice
Turn knowledge into engaging, example-rich insights
Capture key ideas in a flash for fast learning
Enjoy the book in a fun and engaging way
A teenage prankster's computer virus spreading through floppy disks. A doctor's mosquito theorem that would save millions. A market crash that wiped out Nobel Prize winners' fortunes. What connects these seemingly unrelated events? They all follow the same mathematical rules-rules that govern how everything from diseases to ideas to violence ripples through our interconnected world. Long before COVID-19 made "reproduction numbers" dinner table conversation, mathematicians and epidemiologists were quietly mapping the invisible architecture of contagion, discovering that bank failures, viral tweets, and measles outbreaks share a common DNA.
Break down key ideas from The Rules of Contagion into bite-sized takeaways to understand how innovative teams create, collaborate, and grow.
Distill The Rules of Contagion into rapid-fire memory cues that highlight Pixar’s principles of candor, teamwork, and creative resilience.

Experience The Rules of Contagion through vivid storytelling that turns Pixar’s innovation lessons into moments you’ll remember and apply.
Ask anything, pick the voice, and co-create insights that truly resonate with you.

From Columbia University alumni built in San Francisco
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
From Columbia University alumni built in San Francisco

Get the The Rules of Contagion summary as a free PDF or EPUB. Print it or read offline anytime.