diff --git a/book/makefile b/book/makefile
index 06a5b56..ce1dc06 100644
--- a/book/makefile
+++ b/book/makefile
@@ -131,54 +131,51 @@ help:
 	@echo ""
 	@echo "default: builds the book in pdf format (serif)"
 	@echo ""
-	@echo "all: pdf serif and sans-serif accessible version, as well as ebooks"
-	@echo "     in colour and black&white versions"
+	@echo "Releases:"
+	@echo "  all: pdf serif and sans-serif accessible version, ebooks in colours"
+	@echo "     and black&white versions and the website"
 	@echo ""
-	@echo "bake: same as build all"
+	@echo "  bake: same as build all"
+	@echo ""
+	@echo "  release_serif: build serif only version of pdf and ebook"
+	@echo "  release_sans_serif: build sans-serif/accessible version of pdf"
+	@echo ""
+	@echo "Portable Document Format (pdf):"
+	@echo "  build_sans_serif_pdf: build accessible pdf only (same as release_sans_serif)"
+	@echo "  build_serif_pdf: build serif pdf only"
+	@echo "  build_pdf: builds both serif and accessible pdf"
+	@echo ""
+	@echo "Ebooks (epub):"
+	@echo "  build_ebook: builds only the colour ebook"
+	@echo "  build_bw_ebook: builds the low res black & white ebook"
+	@echo ""
+	@echo "Website:"
+	@echo "  website: build the static website from LaTeX sources and post-process it"
+	@echo "  html: build the static website from LaTeX sources _without_ post-processing"
 	@echo ""
 	@echo "check: runs static analysis checker on LaTeX source to spot"
 	@echo "       programming or typographic mistakes"
 	@echo ""
-	@echo "clean: delete all intermediate files keep targets (pdf/ebooks/website)"
-	@echo ""
-	@echo "mrproper: delete all generated files intermediate and pdf/ebooks/website"
+	@echo "Cleanup:"
+	@echo "  mrproper: delete all generated files intermediate and pdf/ebooks/website"
+	@echo "  clean: delete all intermediate files keep targets (pdf/ebooks/website)"
 	@echo "  clean_figures: delete intermediate TikZ files"
 	@echo "  clean_website_build: delete intermediate website files"
 	@echo "  clean_ebook_build: delete intermediate ebook files"
 	@echo ""
-	@echo "build_pdf: builds both serif and accessible pdf"
-	@echo ""
-	@echo "build_ebook: builds only the colour ebook"
-	@echo ""
-	@echo "build_booklet: builds only the short booklet"
-	@echo ""
-	@echo "build_bw_ebook: builds the low res black & white ebook"
-	@echo ""
-	@echo "build_sans_serif_pdf: build accessible pdf only"
-	@echo ""
-	@echo "build_serif_pdf: build serif pdf only"
-	@echo ""
-	@echo "figures: build TikZ figures"
-	@echo ""
-	@echo "release_serif: build serif only version of pdf and ebooks"
-	@echo "release_sans_serif: build sans-serif/accessible version of pdf"
-	@echo ""
-	@echo "website: build the static website from LaTeX sources and post-process it"
-	@echo "html: build the static website from LaTeX sources _without_ post-processing"
-	@echo ""
 	@echo "Debug targets:"
 	@echo ""
-	@echo "quick: compiles serif_pdf but runs lulatex only once"
+	@echo "figures: build TikZ figures only"
 	@echo ""
-	@echo "quick_ebook: compiles ebook but runs lulatex only once"
+	@echo "Quick builds:"
+	@echo "  quick: compiles serif_pdf but runs lulatex only once"
+	@echo "  quick_ebook: compiles ebook but runs lulatex only once"
+	@echo "  quick_booklet: compiles booklet but runs lulatex only once"
 	@echo ""
-	@echo "quick_booklet: compiles booklet but runs lulatex only once"
-	@echo ""
-	@echo "show_tools_version: Show version of tools used on the build machine"
-	@echo ""
-	@echo "print-X: print makefile variable X"
-	@echo ""
-	@echo "printvars: print all variables in the makefile"
+	@echo "Dump informations:"
+	@echo "  show_tools_version: Show version of tools used on the build machine"
+	@echo "  printvars: print all variables in the makefile"
+	@echo "  print-X: print makefile variable X"
 	@echo ""
 	@echo "set DEBUG i.e make DEBUG=1 build_ebook to add debug flags to commands"