TABOOS AND ISSUES is the latest in the series of photocopiable Teachers' Resource Books. It covers many serious issues which are usually, and quite reasonably, considered unsuitable for inclusion in general coursebooks. It provides the opportunity for adults to discuss controversial issues.
not every lesson holds up in 2020, but a surprising number of them do, considering this was printed nearly 20 years ago. Easy-to-use, teacher- and student- friendly mini lessons on a variety of topics for intermediate to advanced students, I've been using this (and recommending it to new teachers) for years. Also good is Instant Discussions, from the same author/time period.