diff --git a/to-m4b.sh b/to-m4b.sh
index f71e395..658765f 100644
--- a/to-m4b.sh
+++ b/to-m4b.sh
@@ -8,18 +8,12 @@ declare -r script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
 # VARS
 LEADING_ZEROES=2
-SRC="${SRC:${script_dir}/src}"
-OUT="${OUT:${script_dir}/out}"
-AUTHOR="${AUTHOR:-}"
-NARRATOR="${NARRATOR:-}"
-TITLE="${TITLE:-}"
-YEAR="${YEAR:-}"
-SERIES="${SERIES:-}"
-SERIES_INDEX="${SERIES_INDEX:-}"
+MAIN_SRC="${SRC:${script_dir}/src}"
+MAIN_OUT="${OUT:${script_dir}/out}"
 
 # FUNCTIONS
 parse-vars() {
-  # TODO implement parsing the directory structure to fill in missing vars and return them
+  # TODO implement parsing the directory structure of the passed directory, to fill in missing vars and return them
   # Series structure: ${SRC}/<author>/<series>/Book <part> - <year> - <book> {<narrator>}/
   # Standalone structure: ${SRC}/<author>/<year> - <book> {<narrator>}/
   # Return the <part> wihh leading zeros based on the LEADING_ZEROES variable
@@ -61,13 +55,7 @@ m4b-merge() {
 }
 
 main() {
-  parse-vars
-  local book_dirs
-  IFS=$'\n' read -r -d '' -a book_dirs < <(get-book-directories && printf '\0')
-  for book_dir in "${book_dirs[@]}"; do
-    local book_output_file="${OUT}/${AUTHOR}/${(SERIES:+${SERIES}/)}${(SERIES:+Book ${SERIES_INDEX} - )}${YEAR} - ${TITLE}.m4b"
-    m4b-merge "${LEADING_ZEROES}" "${book_output_file}" "${book_dir}" "${AUTHOR}" "${NARRATOR}" "${TITLE}" "${YEAR}" "${SERIES}" "${SERIES_INDEX}"
-  done
+
 }
 
-main "$@"
\ No newline at end of file
+main "$@"