diff --git a/README.org b/README.org
index be90303..1d2359e 100755
--- a/README.org
+++ b/README.org
@@ -20,3 +20,7 @@ data using the R programming environment
 ** Iteration
 
  * [[./script/iteration.R][Lapply, apply and for loop: brief introduction]]
+
+** Interesting packages
+
+ * [[./script/roadoi_package.R]['roadoi']]
diff --git a/script/roadoi_package.R b/script/roadoi_package.R
new file mode 100755
index 0000000..be30353
--- /dev/null
+++ b/script/roadoi_package.R
@@ -0,0 +1,33 @@
+#' ---
+#' title: "Knowing the package 'roadoi'"
+#' date: "2022-06-19"
+#' author: "Jose"
+#' output:
+#'   html_document:
+#'    code_folding: show
+#'    toc: yes
+#'    toc_float:
+#'      smooth_scroll: true
+#'    df_print: paged
+#'    highlight: zenburn
+#' ---
+
+
+#' TODO:
+#'
+#' check https://ourresearch.org/
+#'
+#' remove objects
+
+rm(list = ls())
+
+#' Library
+#' "Find Free Versions of Scholarly Publications via Unpaywall"
+
+library(roadoi)
+
+help(package = 'roadoi')
+
+vignette(package = 'roadoi')
+
+vignette('intro', package = 'roadoi')