No, declining one book does not remove you from receiving books (or dvds). I purchased both of those same books, and enjoyed both. There is also a video library of dvds that you will get in your mailbox as well.
If you want to opt out and not receive a book or dvd or change how often you get books and dvds call customer service. Call the 800 customer service number, when you hear the typical menu options "push 1 for x, push 2 for y, para en espanol numero ocho (

) blah blah blah", at that menu just keep pushing zero (about three times last time I called about a year ago) even though you're never given the option (it's a hidden option) you'll zero out to an operator that can change you're library options for you or cancel if you choose.
I declined my book and dvd library options but they gave me the options if I wanted to change the frequency I received them. You can change how many books and dvds you're sent; one a month, two a month, twice a year, only dvds, only books, however often you want to get one.
I dropped out of the library completely when I got two books and a dvd in a two week time period. I might re-up for one book a month, eventually. It was too much at the time. And it's pretty cool because you get free stuff with the books too. In the three books I've purchased I got two Berkley PowerBait sample packs and a 150yd spool of Triline 8lb XL.
Please keep in mind any stuff you get with books of dvds is not a Member Test Trial product. It's just free stuff. It's like the info-mercials on at night, "Buy this and if you don't like it, return it but keep the flash light as our free gift to you" kind of deal. There's been a lot of confusion before on these message boards about people getting books with a pack of hooks or a spool of line and think it's a test product and asking about the product review sheet to fill out, and it's not. It's just free stuff to keep you interested in the receiving the books and dvds.