Reddit mentions of Discrete-Time Signal Processing (3rd Edition) (Prentice-Hall Signal Processing Series)

Check out chapter 7 of Discrete-Time Signal Processing by Oppenheim and Schafer. The whole book is great.

This book.

It kind of sounds like you'd be good just getting a textbook. I think any book will be fine since you mainly just want questions (and presumably answers), but try to find one that implements code in a language that you're comfortable with, or that you want to learn.

There are a lot of different "final year" DSP courses, but it sounds like you want something covering the fundamentals rather than anything too advanced. I started off with The Scientist & Engineer's Guide to Digital Signal Processing and then used Signals and Systems for my first undergraduate course, but we used it largely because he co-authored it. I would recommend scouring the web for some free books though. There are books like ThinkDSP popping up that seem pretty neat.

Edit: Oppenheim is always mentioned also.

Links
www.dspguru.com

Videos
Oppenheimer's MIT Lectures
(http://ocw.mit.edu/resources/res-6-008-digital-signal-processing-spring-2011/video-lectures/)
Digital Filters I through V (Hamming Learning to Learn on Youtube)
Monty's Presentations http://www.xiph.org/video/

Books
Schaum's Digital Signal Processing (<= Recommended It's good and cheap.)
http://www.amazon.com/Schaums-Outline-Digital-Processing-Edition/dp/0071635092
Signals and System Made Easy
http://www.amazon.com/Signals-Systems-Made-Ridiculously-Simple/dp/0964375214
ftp://ftp.cefetes.br/cursos/EngenhariaEletrica/Hans/Sinais%20e%20Sistemas/ZIZI%20Press%20-%20Signals%20and%20Systems%20Made%20Ridiculously%20Simple.pdf

Discrete Time Signal Processing
http://www.amazon.com/Discrete-Time-Signal-Processing-Edition-Prentice/dp/0131988425/

Discrete Time Signal Processing (Older version I used in school)
http://www.amazon.com/Discrete-Time-Signal-Processing-Edition-Prentice-Hall/dp/0137549202/

DSP using MATLAB
http://www.amazon.com/Digital-Signal-Processing-Using-MATLAB/dp/1111427372/

Digital Signal Processing Prokais
(Similar to Oppenheimer book, but found it clearer in some instances from what I remember. )
http://www.amazon.com/Digital-Signal-Processing-4th-Edition/dp/0131873741/

Books I've seen around
Understanding Digital Signal Processing
http://www.amazon.com/Understanding-Digital-Signal-Processing-Edition/dp/0137027419/

Scientist-Engineers-Digital-Signal-Processing
http://www.amazon.com/Scientist-Engineers-Digital-Signal-Processing/dp/0966017633/

http://www.dspguide.com

I know of some good text books that are pretty easy to read. The Oppenheim and Schafer are considered by a lot of my former profs to be the bible of DSP intro:

http://www.amazon.com/gp/product/0131988425/ref=pd_lpo_k2_dp_sr_1?pf_rd_p=486539851&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=0132146355&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=17WDV1JR8EA7P3D8W78A

It's pretty comprehensive, so if you're looking for something simpler, this is a pretty short and intuitive intro text (which was actually my first exposure to DSP!):

http://www.amazon.com/Digital-Signal-Processing-Primer-Applications/dp/0805316841