Handbook of the International Phonetic Association: A Guide to the Use of the International Phonetic Alphabet Book

Well worth reading for anyone who ever comes into contact with IPA, which is probably most people. A lot of aspects of the alphabet are obviously intuitive, but a number of conventions and assumptions are not, and can be easy to miss if you weren't introduced to it in an academic context.
Most of the book is given over to illustrations of IPA's use in the form of phonological inventories of and transcribed texts in twenty-nine different languages, and a lot of them are deliberately obtuse in an instructive way (e.g. for Japanese, the only sibilants mentioned on the chart are /s/ and /z/, with the acknowledgement that they become [É•] and [Ê‘] (sic) before /i/ buried in the middle of the Conventions section'it's good to be aware that this is something people can do, even if you'd obviously usually punch them if they did); the Dutch one is, as is common, nonsense almost from start to finish.