Reddit reviews New SAT Reading Practice Book

I haven't used that book in particular, but I've used IES books for reading (this one in particular) and I would say they're comparable to the real test if not a bit easier.
I think they're good for familiarizing yourself with the passages/question types, but for getting total accuracy on the real test I would stick with the officially released tests.

I'm an avid reader who breezed through AP Literature and AP Language Arts. I thought I'd breeze through the reading portion of the SAT test when I took my first practice test, instead I missed at least 1/3 of the questions. The SAT is not like tests you take in school which are pretty black and white. The SAT wants to "trick" you and they do so by making the questions obscure and the answers written such that it seems more than one could be correct. The turn around point for me was when I heard the tip that the SAT takes great care in writing the questions and answers in such a way that there can only be one answer that is 100% correct. That means the other 3 answers have to include something which makes them wrong. When I came across a question that confused me I started trying to figure out what made an answer(s) wrong versus what made an answer correct. As I took more and more practice tests I started learning the SAT tricks and how to spot them. I ended up getting almost 100% correct on the reading sections, at the most I would miss maybe 1 out of the 52 questions. So how did I get from getting 30% wrong to 0% wrong? Did I suddenly get smarter in my reading? (no). I did it by studying the test itself, taking a TON of practice tests, and understanding what I got wrong and why.

For example, there was a fictional passage that described a character and her father. The main character was patronizing of her father and she was also scornful of him but not outwardly. There was a question along the lines of "the narrator's view of her father can best be summarized as:". One answer was something like "disdainful but outwardly pleasant" another answer choice "wholly patronizing". Well, she was both disdainful and patronizing, so which answer was right?. It was the word "wholly" that disqualified that answer. Wholly means "completely", "absolutely", etc. The narrator wasn't always patronizing of her father, only occassionally. This is a common trick of the SAT, using absolutes like "totally", "never", "always". Things like this you'll start to recognize the more practice tests you take.

Khan academy is good practice since it's free and it closely resembles the real SAT. The problem with Khan academy is that the explanations aren't that great. Some have mentioned 1600.io which is a website with explanations from a perfect tester. You could try that. I used "www.reasonprep.com", but it's not free. (1600.io is).

The most important advice I can give is to study the test itself. Take a ton of practice tests, over and over and over, and understand how to eliminate wrong answers. Figure out the SAT and how it tries to trick you. If you run out of reading passages the closest I've found to SAT type reading passages are the books by Khalid Khashoggi.

https://www.amazon.com/New-Reading-Workbook-Khalid-Khashoggi/dp/0996406409/ref=sr_1_7?ie=UTF8&qid=1522883434&sr=8-7&keywords=Khalid+Khashoggi

Sorry for the long answer. Basically practice a lot, understand why your answers are wrong, get used to the tricks the SAT uses to help you eliminate answers.