[plt-scheme] 2 books

Hi all,

the "one eyed man" thread reminded me of a question I'd wanted to ask for some time - I'd very much like to know your 
opinions on two books which I thought might be "authoritative", but have not yet seen mentioned on this list (well, I could 
have missed it of course):

http://www.amazon.com/Design-Concepts-Programming-Languages-Franklyn/dp/0262201755/ref=sr_1_1?ie=UTF8&s=books-intl-de&qid=1260542775&sr=8-1

and

http://www.amazon.com/Concepts-Techniques-Models-Computer-Programming/dp/0262220695/ref=sr_1_1?ie=UTF8&s=books-intl-de&qid=1260542477&sr=8-1


I've bought both of them, but have not touched the second yet (because this would take quite some time to read). Regarding the first one, I read the first 200 pages or so
but had problems understanding, so I decided to read PLAI first and perhaps come back to it later.

I'd like to know what you think of these books?

Thanks for any replies,
Sigrid