A man becomes engulfed in his book.
A man is enjoying his book.
Enjoying and engulfing a book are two whole different ways of the man reading his book. Just because he is engulfed by his book doesn't mean he is enjoying the book.
exists e1 p1 x1 x2.(exists s1.(in(s1,x2) & Theme(s1,x1) & a_engulf(s1)) & n_book(x2) & of(x2,x1) & n_male(x1) & Topic(e1,p1) & Actor(e1,x1) & v_become(e1) & n_man(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_book(x2) & of(x2,x1) & n_male(x1) & n_man(x1))