As a gift for a friend who is finishing a translatio degree I wanted to get a large IPA chart poster and would like to accompany it with a guide for it. I have seen there is an official handbook but I don't know if it will be up to date with the chart, since the chart has been updated last year and the handbook's last edition is from 1999.
What are the recommended resources? I'm not looking for a specific format, a PDF which I could print and bind or a book available to buy would both do fine (of course low-budget options are preferred).
Many thanks