of course you can have them both, why not?
does any body else want books about RUP and USDP ?
any way USDP book is teached to us in Sharif
University, since RUP is continue of the USDP effor,
it may be very useful for any one who wants to learn
RUP to first read the book OOAD of grady booch and
USDP of 3 amigos before reading RUP if s/he has enough
time. other wise reading the RUP book will no take
much time.