I just found out that Yiannis Moschovakis’s Elementary Induction on Abstract Structures was released as a cheap Dover paperback over the summer. It was previously only available in the horrendously expensive yellow hardback series by… North-Holland, according to Amazon. The secondary literature on the revision theory of truth has recently nudged me into looking at this book, and it is nice to know that it is available at a grad-student-friendly price. Philosophical content to follow soon.