How do ordinary women become extremists? Leafing through photos from the January 6 insurrection, extremist researcher Noelle Cook was struck by how many women looked like her: middle-aged white women in puffy coats. Women were not on the fringes of the extreme right, she realized. They were radicalizing each other, and the pandemic was changing them. So who were the women of J6? And why did some of them believe in shape-shifting reptilians and the health benefits of colloidal silver? This is the world scholars call conspirituality, in which New Age religion, online wellness culture, and extremism blend and become laced with antisemitic and racist theories. With acute attention to the emotional lives of women and research on conspiracism, Cook introduces us to Tammy, who believed storming the Capitol would help take down a global cabal of pedophiles. We also meet Yvonne, convinced she is a starseed destined to lead others into the fifth dimension. We visit a trade show where vendors hawk everything from quantum healing devices to government cover-ups, and trace the movement's roots to a nineteenth-century mystical philosophy. With arresting detail, The Conspiracists draws us into the lives of conspiratorial women to explore how and why women are becoming radicalized. Women are crafting entire worlds, Cook argues, and we ignore these worlds at our own peril. As misinformation spreads and extremism intensifies, The Conspiracists does not seek to excuse women's conspiracism but rather to understand it. Otherwise, we have no hope of countering its force.