It is an odd business writing books (other than research monographs which get reviewed in the journals and perhaps with luck discussed by a few colleagues).
You send your best efforts out into the wider world to take their chances and have precious little idea of how they are really received. For example, the second edition of IFL is downloaded over 10K times a year. I don’t think one reader in a thousand lets me know how they found the book.
So I take comfort and encouragement where I can! And I’ve just spotted a new review on Amazon for Godel Without Too Many Tears (the first for its second edition, though the review is linked to the original edition, which I’ll try to get changed):
Clearly the best concise introduction to Gödel’s theorems ever written. I bought the first edition and found in a very few places errors and margin for a more felicitous presentation. Nothing, however, that could stump an astute reader. In the second edition … this is all corrected. The book really does accomplish the miracle of being self-contained, though, of course, a reader may come up with questions not covered in the book. In that case it may be helpful to consult the author’s more complete treatment in “An Introd. to Gödel’s Theorems” (also cheaply available from Amazon) or a book like Boolos, Burgess & Jeffrey.
I recommend the book not only to students but also to academic teachers. It is a model of how logic ought to be taught.
I can very happily live with that!