Update 250-are-there-any-books.md

add a new book about svelte

site/content/faq/250-are-there-any-books.md

@@ -7,3 +7,5 @@ There are a few books:
 - [Svelte Handbook](https://flaviocopes.com/page/svelte-handbook/) by Flavio Copes
 - [Svelte 3 Up and Running](https://www.amazon.com/dp/B08D6T6BKS/) by Alessandro Segala
 - [Svelte and Sapper in Action](https://www.manning.com/books/svelte-and-sapper-in-action) by R. Mark Volkmann
+- [Simple Svelte](https://wfq.gumroad.com/l/simple_svelte) by Darren Wang
+