John W. Allie is an illustrator and writer. He has been using Blender since 1999, when it wasn't even open source. Blender is an important part of his personal and professional work, which includes everything from games to animations. He lives in New Haven, Connecticut, where he is currently working on a graphic novel.

Allan Brito is a Brazilian Architect and a specialist in information visualization, who lives and works in Recife, Brazil. He works with Blender 3D to produce animations and still images for visualization and instructional material. Besides his work with Blender as an artist, he also has a wide experience in teaching and researching about 3D modeling, animation, and multimedia.

He is an active member of the community of Blender users and writes about Blender 3D and its development for websites in Brazilian Portuguese (http://www.allanbrito.com) and English (http://www.blender3darchitect.com and http://www.blendernation.com). Besides his two blogs, he has managed to write three books about Blender in both English and Brazilian Portuguese, covering topics such as architectural visualization, mechanical modeling, and general Blender guides.

To find out more about him visit the website http://www.blender3darchitect.com, where he covers the use of Blender and other tools for architectural visualization.

Matt Campbell graduated from Conestoga College with a diploma in Mechanical Technology. He has worked in the 3D modeling world since 2007, working mostly with CAD packages. Recently, he has become interested in creating immersive 3D movies.

Bryan Tenorio studied 3D animation in both high school and in college. He specializes in using Blender as his main tool, and Gimp for most 2D work. He has worked on various freelance jobs. He was on a small team that did previz work for the film 0000, by Eddie Alcazar. He also worked on a few Indie games with (Subli)minal Gaming. Currently he's employed at Rival Theory, a software company that specializes in artificial intelligence for video games.

Willem Verwey is the founder and Chairman of the 3D Animation Network www.3danim8.net. The 3D Animation Network introduced children to animation using Blender since 2007.

He has also served on the Blender Foundation Certification Review Board since 2007.

He is the co-owner of Metagon Games and is currently working on Hidden Object Adventure Games distributed by Big Fish Games.

He technically reviewed Material Cookbook.