I am working my way through this book on my own. I have briefly studied a little logic before.
Generally the explanations are excellent and easy to understand. However, there are occasions where Guttenplan makes a leap with a throwaway such as 'as it can be seen' when it can't without further explanation.
At one point I thought that I was going to have to give up but the book is structured in a strange way. After the conventional chapters there is a series of lessons - I don't really understand why. I found the answer to my problem here and I hope that if I get stuck again the relevant lesson will help.
I got hold of this book as further reading suggested by another volume. I did get stuck with that one, so thank goodness for this.
The reader is given a thorough grounding in manipulating symbols before moving on to 'real' problems. To some this may be a little tedious but I think that it builds confidence. I became stuck on the previous book because I got to a stage where I could not handle the so called real problems and, again, because there were too many gaps.
To anyone wanting to study alone, this is probably the best you will find.
20 01 10
Eventually this book defeated me. There came a point where I was unable to take the next step. I have come to the conclusion that one can't learn logic alone.