Firetown & the Tolkeen Crisis is part of the Chi-Town 'Burbs series.
http://palladium-store.com/1001/product/854-Rifts-Adventure-Sourcebook-Two-Tolkeen-Crisis.html omits the first 3 words and just calls it "Tolkeen Crisis"
Most fans just refer to it as Firetown though since that is the central focus.
A notable aspect is an Apok NPC who can still use his mask due to a special PPE ritual