A New Book by Lindsay Oliver · Out Now
Marshmallows
Are Their Favorite
Undercover at a primate lab
One investigator. Four months undercover. Getting in was the easy part.
A fast-paced true story about a hidden world, the adrenaline of going undercover, and the cost of living a lie long enough to tell the truth.
Out now in hardcover & ebook
Not ready to order yet? Get news & exclusive updates →
About Lindsay Oliver
Author · Investigator · Executive
Lindsay Oliver is an award-winning undercover investigator and writer who has spent more than two decades exposing some of the world's most hidden industries. She has personally conducted or overseen more than a hundred investigations across research laboratories, animal agriculture, zoos, circuses, and other systems that operate largely out of public view.
Her work has generated major media coverage, driven corporate and legislative change, and is featured in the documentary Eating Animals produced by Natalie Portman.
Read full bio"One of the most unsettling things about undercover work is how ordinary everything can seem while something profoundly wrong is happening."
— Lindsay Oliver
What People Are Saying
"Marshmallows Are Their Favorite
needs to be widely read."
Peter Singer
Author of Animal Liberation
"A thriller, an exposé, even a love story. But even more than that, it is an intensely personal and revealing journey of one woman willing to risk her own safety as she navigates two identities in an attempt to shine a light on the truth."
Ari Solomon & Mikko Alanne
Award-winning producers of The Animal People
"Unforgiving, empathetic, raw and real. An eye-opener. A broken system that is fundamentally cruel, crude, and irrelevant in these technological times."
Ingrid Newkirk
Founder and Principal, PETA, and author of numerous books, including Animalkind
"Lindsay Oliver's courageous work clearly and shockingly reveals that too often scientists neglect this basic responsibility to nature's sentient and vulnerable beings. This honest story must be told."
John Gluck, Ph.D.
Professor Emeritus, former animal researcher, and author of Voracious Science and Vulnerable Animals
Limited Edition
The Collector's Box
$125
A signed hardcover, a plush monkey named Omelet, and eight more custom-designed pieces in an embossed keepsake box. Made in a small run — when they're gone, they're gone.
Media & Press
For Journalists,
Producers & Hosts
Lindsay is available for interviews, podcast appearances, and speaking engagements. The full media kit — synopses, bio, praise, fast facts, book details, and high-resolution photography — is ready to download.
Stay Connected
Order Marshmallows Are Their Favorite by Lindsay Oliver
The book is out now. Grab a copy, and sign up for events, news, and what comes next.
Send Marshmallows
The story doesn’t end
with the last page
Take action at sendmarshmallows.com — a campaign launched with the book that gives people a way to send the monkeys a treat and a note—and ask the seven US primate research centers for what no treat can provide: a future beyond the lab.
Visit SendMarshmallows.com →