Brief version: There is now a hardback version available of the second edition of An Introduction to Formal Logic: ISBN 978-1916906327. It should now be available to order from bookshops (as well as from Am*z*n and some other online sellers). It is priced at £20/$25, about the minimum possible. I’ve just got a sample copy and it is very decently produced.
Longer version: You’ll probably recall that I recovered the copyright of the second edition of IFL a year ago so that I could make the PDF freely available (a pretty small gesture in these difficult times, but every little helps). Lots of students, though, do prefer to work from a physical book: so I also set up an inexpensive print-on-demand paperback (to minimise the cost, that is Am*z*n only).
Now, as I’ve said before, self-publishing has the downside that the word doesn’t get out to librarians via a publisher’s fancy catalogue. But in any case, in last year’s lockdown, and more recently too, librarians were rightly concentrating on improving their e-resources, so it didn’t seem the time to fuss too much about getting physical copies into libraries. However, things are slowly returning to something more like the old normality for library operations. So I have now arranged for ‘proper’ hardback copies — printed by Lightning Source who do small-run/on-demand printing for some academic presses — to be available for library purchase at minimum cost from, inter alia, standard library suppliers. So do please ask your friendly local university or college librarian to order a copy or two (emphasizing, if you need to, that this is a significantly changed book from the first edition). Online resources are all well and good, though problematic for some students: to repeat, at textbook-length, many — like me — do much prefer to have real books available!