You can also find books such as "Windows Script Host Programmer's Reference" by Dino Esposito, published by Wrox.
Another one is "Sams Teach Yourself Windows Script Host in 21 Days" by Thomas Fredell, Michael Morrison, Stephen Campbell (Contributor), Ian Morrish, and Charles Williams, published by Sams.
Or try "Windows Script Host" by Tim Hill, published by Macmillan.
If you are interested in COM, you might want to read "Inside COM" by Dale Rogerson, published by Microsoft Press.