diff --git a/books/book_ideas.md b/books/book_ideas.md
index 1a92ca4e..ef0cfa68 100644
--- a/books/book_ideas.md
+++ b/books/book_ideas.md
@@ -8,3 +8,5 @@
 - [ ] Fortran for fun and profit
 - [x] RxSwift by tutorials
 - [ ] Mastering git
+- [ ] Mastering flutter
+- [ ] Mastering js