allow only digits to be scanned as a book name
tree20f772be995aad3bf499711f4a6b6f3f1d35d766
-rw-r--r-- 22 .gitignore
-rw-r--r-- 1211 LICENSE
-rw-r--r-- 292 Makefile
-rw-r--r-- 1369 README.md
drwxr-xr-x - data
drwxr-xr-x - src