Fans of An Absolutely Remarkable Thing. You can join by clicking here.

The unofficial Nerdfighteria Discord server. You can join by clicking here. Loosely affiliated with Eff Yeah Nerdfighters.

Tuataria is a community of "cyber sleuths" that came to be when John Green announced a scavenger hunt before the release of his book Turtles All The Way Down. It exists mainly on Discord, with three main servers: Tuataria, Hogwartaria (the Harry Potter roleplay server), and Bibliotaria (for everything books). You can join by clicking the link attached here. The Tuataria Book Club is available here.

A book club wherein, every six weeks, a book is chosen by John Green and Rosianna Halse Rojas to be read and discussed. The official Discord discussion groups can be joined by clicking here.