Merge pull request graphql#625 from rwieruch/patch-1

Add new GraphQL Book

Author: orta

site/community/Community-Resources.md

@@ -107,6 +107,7 @@ Developers inside and outside of Facebook have given talks about GraphQL at conf
 - [Fullstack GraphQL](https://www.graphql.college/fullstack-graphql) by Julian Mayorga
 - [Craft GraphQL APIs in Elixir with Absinthe](https://pragprog.com/book/wwgraphql/craft-graphql-apis-in-elixir-with-absinthe) by Bruce Williams and Ben Wilson
 - [Learning GraphQL and Relay](https://www.packtpub.com/web-development/learning-graphql-and-relay) by Samer Buna
+- [The Road to GraphQL](https://www.robinwieruch.de/the-road-to-graphql-book/) by Robin Wieruch
 
 ## More Resources