Believe it or not, but I assume the majority of us don't own the book, nor are many of us either of the two people who wrote it, so not only can't we answer any of your questions with any certainty, we also can't magically guess what the URL listed in the back of the book is to look at it and possibly help you find the other examples you are looking for.
After looking at some of the online "Sample Hacks" from the book, it appears that it is primarily a recipe book of re-usable code snippets, with very little text. As such, it doesn't seem like it would be prudent on their part to make all of the code examples from the book available online at a publicly accessible URL. (assuming they want to make some money).
It doesn't have an animal on the cover because it is a "Hacks" book. All of the "Hacks" books have tools on the cover (which i just learned 28 seconds ago, by going to the book page to get info on it and clicking on the http://hacks.oreilly.com/ link).
Re: [OT] Complaints about Spidering Hacks book
Yeah, I might email O'Reilly about that. I think I'll mention the one especially long script that I'd like and just suggest a few ways they could provide the code to customers without making them type it in. Maybe they'll decide to email me at least that one script. I don't think O'Reilly should give library customers the code unless a CD comes with the book.
You're right about staring at the scraper. It looks like a fish.
Ahh.... I see Where do I post X now! I thought I'd seen it before. Those section descriptions should be under the section names when you go to the section. (Yes, I know that goes in PerlMonks Discussion.)