Even though Dell was my favorite company back in my collecting days, I never saw this book before now. Hy Eisman and Vince Colletta make quite a team. Colletta's inks add flash and glamour to the mix, but the women's enormous breasts and wasp waists look almost comical (I notice this was toned down in the second issue).
I agree the cover might have originated on a Dell paperback, but though they're well-painted, the faces of the man and the woman aren't McGinnis' style.
Link to the book:
Private Secretary 01