For next Tuesday (1/22), please read the following book chapter, which can be downloaded from the “Readings” section of this website. (Note that the “Readings” section is password-protected–you can find the password on the first page of the printed syllabus.)
Giegerich, Heinz. 1992. English Phonology: An Introduction, Chapter 2 (“Towards a sound system for English: consonant phonemes”). Cambridge: Cambridge University Press.