diff --git a/marketplace/scribblings/marketplace.scrbl b/marketplace/scribblings/marketplace.scrbl
index b25c992..feceaa3 100644
--- a/marketplace/scribblings/marketplace.scrbl
+++ b/marketplace/scribblings/marketplace.scrbl
@@ -8,7 +8,7 @@
 
 @defmodulelang[marketplace]
 
-This manual TODO
+This manual TODO (overview & motivation)
 
 @local-table-of-contents[]
 
diff --git a/marketplace/scribblings/writing-drivers.scrbl b/marketplace/scribblings/writing-drivers.scrbl
index abcf8fa..46a8418 100644
--- a/marketplace/scribblings/writing-drivers.scrbl
+++ b/marketplace/scribblings/writing-drivers.scrbl
@@ -4,4 +4,5 @@
 
 @title{Writing New Drivers}
 
+*** ground-vm's usage of Racket evt?s
 *** pseudo-substruct