Peter Roach - Phonetics

has anyone here read Peter Roach's Phonetics (Oxford) and Peter Roach's English Phonetics & Phonology (Cambridge)?

I'm supposed to have an oral exam in the former, but I've only read the latter and I haven't figured it out up until a few moments ago.

How fucked am I?

>>4
Been trying to, but all I can muster is a .pdf of the Cambridge one.