make make clean cleaner

Makefile

@@ -22,6 +22,9 @@ all: $(BOOK).pdf
 
 clean:
 	rm -fr *.aux *.sls *.slo *.slg *.toc *.acn *.log *.out *.idx *.ist *.glo *.glg *.gls *.acr *.alg \
+	*.ilg \
+	*.ind \
+	*.ptc \
 	*.pdf \
 	svg-inkscape \
 	*.fdb_latexmk \