I find it quite challenging, but in conjunction with the other two I named should offer plenty for the 1700 player.

i doubt that idimayuga has a 1800 icc record with a 1460 uscf record. Little did you know, that dan Heisman is my coach and he does say that icc ratings are 150 higher than uscf ratings. So Idimayuga, you should be 1600-1650 on icc. I play there several times a week with 45/45 and 90/30 games. I bought dans book called the Improving chees Thinker, and it says that players with a rating of 1400-1600 uscf are equal to 1550-1750 icc standard.  You are a Class C player, so that means that your main problem is blundering pieces. And 1800 icc standard players blunders are few.

I don't play OTB often so my 1400 was also my first rating when I started 19 years ago.  I've had a >1800 ICC Standard for the last 2 years as my coach GM Villamayor can confirm.  I was just making the point that the gap is not A player ICC Standard = E player USCF.  That's definitely way off. 

Internet ratings aren't real anyway.  If you cite a rating for credibility it must either be FIDE, USCF, or any national official ratings for those outside America.  On the Internet someone's (real life) master uncle or whatever can give them hints. 

I think we got off topic however you might want to consider "Winning Chess Tactics for Juniors".  It's $10 on Amazon.

Once again - why would anyone use a book to train tactics when they can use CT-Art or Chesstempo? 

Because some people like books.  Before I go to bed I look at a tactics book rather than have a laptop on doing CT-Art, etc...

I find the book more convinient actually.  I can open it immediatly anywhere and I even mark which puzzles I've failed or solved in the past so I can warm up with easier ones and then do ones I've found difficult before.

Not that online tactics are inconvenient, I do those from time to time too.  If you're wondering why they'd want to spend the money, that's a good question.  The tactic books I've bought were before these tactic sites were around.

Fair enough.  I wasn't being sarcastic - I was genuinely wondering if there was some advantage to the books other than pure preference.  

In that case, if you like books:

Chess - 5,334 Problems, Combinations, and Games

That book is about 5" thick and has all the solutions in the back.  I doubt there's a larger tactics book out there.  I rented it from my local library this past summer when I first got into chess.

after all of ya'll suggestions, i found something that works for ME. i'm going with tempo. idimayuga was right. i have ct-art, but after a month i really hate carrying my laptop to home and work. So now i simply just do tempo from my phone, which is smaller than any tactic book. I have a smart phone with big screen so i can see tactic puzzles easily. Plus i carry my pnone every where. I am really enjoying tempo, over books because i have unlimited tactics and i dont have to waste time checking answers , like we do when we are doing tactics from books. Anyone that has a cellphone knows that they keep their phone with them at all times, so its like saying i keep an unlimited tactic supply with me at all times.

I bought a lot of books in the past. Winning chess tactics for juniors was my best tactic book, but Combination Challenge was still too hard to follow after juniors. Thats when i bought Chess School 1b, but lost interest because 80% of problems were mate problems. Then thats when i created this post.