-TEXIS = projects.texi intro.texi threads.texi mlfqs.texi userprog.texi \
-vm.texi filesys.texi references.texi standards.texi doc.texi devel.texi \
-debug.texi
+TEXIS = projects.texi intro.texi tour.texi threads.texi mlfqs.texi \
+userprog.texi vm.texi filesys.texi references.texi standards.texi \
+doc.texi devel.texi debug.texi