Overall, I think this was a good book. It went into a lot of detail about how to perform the night prayers, and it did it in a manner that someone who is new to Islam could understand, but still have something for those who have been Muslims for a longer period of time. The one thing that I didn't like was it spend so long going over the argument about how long the night prayers are, and a lot of this section was confusing. I think it would've been better to have that argument in maybe a booklet for those who have a better understanding; for this book, I think it would've been better to do a briefer overview of this argument. Other than that one section, this is a simple read.