Zolgar: As for "giving it up front to anyone who pledges", there's an unfortunate problem with that.. If the Kickstarter doesn't fund, he'd end up giving out potentially a pretty high number of copies of the first book for absolutely no reason.
ET3D: It's not "for no reason", it's for promotion. Many content creators are locked into the misconception that a free copy equals a lost sale, which is quite untrue. Very often it actually brings more sales. If a book has very few sales (which is presumably the case, or your father wouldn't have had a problem financing the next book off the first), and assuming it's actually a good book, giving away copies or having very low priced promotions would probably do only good, getting more people to know about the book and more people to want the sequel.
Actually dad has given away a fair number of copies already.. The problem is neither the quality of the book, nor the price point. The problem is the marketing and getting it actually in to the hands of more readers than just those in the immediate range.
The notion of "If I give this person a copy of the book, they'll tell their friends how good it is.." is all well and good, but the thing is.. in all reality, it doesn't hardly work.
Only a small fraction of the people who partake in any form of media will review it, and while more of them will talk about it to their friends... well, if someone says to you "Hey, this book is great, you should read it.", it will probably be added to your list of books to look in to.. and probably promptly forgotten about until you see/hear something that reminds you of it..
When that's a big name book, you may see it in a book store, or hear someone else talking about it, or any number of other things. If it's a little indie, you're probably never going to think about it again.
Now, further..
Most creators and artists I know (which is a lot), will actually disagree with your notion that giving shit away or taking a loss is good for business.. because they've all tried it, and found out the hard way that.. If you give your product away, or you sell it for super cheap, that's what people expect of you.. The person who "loved your CD" when they got it for $1, probably won't be $10 interested in your new album. Generally speaking undervaluing your work in order to "get out there" is a newbie move that miiight help short term, but hurts a lot more long term.
All that said though.. I am pestering my father to make a few changes to the Kickstarter, because on looking at it again.. I realize there are some .. major problem with the presentation. >.>