The art of facilitation: Help others visualise, creating the conditions for effective group conversations, and focus on the objectives of the discussion.
Facilitator’s Guide to Participatory Decision-Making
Author: Sam Kaner
Defining what facilitation is and how it can be used, this book provides a number of examples and exercises to help you facilitate key discussions leading to quick decision making


Training from the Back of the Room! 65 Ways to Step Aside and Let Them Learn
Author: Sharon L. Bowman
A book needed by any trainer, Training From The Back of the Room will help you get better engagement, results and improve the way people learn.
Agile Retrospectives: Making Good Teams Great
Author: Esther Derby, Diana Larsen
Fantastic guide when using retrospectives. With many different examples, you can keep your retrospectives fresh while learning how to manage team conflict and help build cohesion.

Geoff Watts: Ten Easy Ways To Make Your Agile Retrospecives Great Again!
Incredibly useful tips to set your team up for success when facilitating retrospectives.
SkyScanner Growth: The art of Impact Mapping
A description of what impact mapping is, how to use it and its benefits.
Certification:
Bikablo Training A trainer in visual facilitation, helping you improve your skills when capturing information when facilitating.
ICAgile: Provides a course focused on Agile facilitation when hosting workshops, meetings, or training.
Other useful resources
Impact Mapping: A useful technique for mapping out how different actors areas will affect others, leading to better product decision making – https://www.impactmapping.org/
User Story Mapping: Follow the users journey through your product, understand decisions they may make and how to best improve their experience – https://www.jpattonassociates.com/user-story-mapping/
Pizza Game: https://www.agile42.com/en/kanban-pizza-game/
Coin Game: https://medium.com/@brunodelb/the-agile-game-penny-game-to-observe-the-influence-of-the-batch-size-of-tickets-on-a-kanban-board-ead307542e52
Paper Planes: https://www.teambenwillmott.com/tbw-blog/the-paper-airplane-game
RetroMat: A tool I have used for years, generate a retrospective from a huge list of examples to keep your retro’s different – https://retromat.org/en/?id=84-6-118-24-60
Lean Coffee: Get everyone to write down points they wish to discuss. Make them visible on a wall or screen. Each participant gets 3 votes and then discuss them from the highest voted down! Spend 5 minutes per topic, allow for additional discussion if the group wishes to continue the topic. https://agilecoffee.com/leancoffee/