To prepare for the course, you could study one or more of the following.
P. Ashby (2005) Speech Sounds. 2nd Ed. Routledge.
B. Collins, I. M. Mees and P. Carley (2019) Practical English Phonetics and Phonology. 4th Ed. Routledge.
P. Carley, I. M. Mees and B. Collins (2017) English Phonetics and Pronunciation Practice. Routledge. (Japanese edition, trans. H. Miura, Tokyo: Taishukan, 2020.)
A. Cruttenden (2014) Gimson's Pronunciation of English. 8th Ed. Routledge.
P. Roach (2009) English Phonetics and Phonology. 4th Ed. CUP.
J.C. Wells, 2006. English Intonation. CUP.
Also of use:
International Phonetic Association (1999) Handbook of the International Phonetic Association. CUP.
G. Lindsey (2019) English After RP: Standard British Pronunciation Today. Palgrave Macmillan.
P. Roach, J. Setter and J. Esling (eds.) (2010) English Pronouncing Dictionary. 18th Ed. CUP.
J. Setter (2019) Your Voice Speaks Volumes: It's Not What You Say, But How You Say It. OUP.