Good idea!
I like this book in general, but just to point out a bit of a hole: In the 4.Bc4 variation, on page 86-87, Willemze recommends 5.Bc4 Bg4 6.Nge2 Nbd7 (?!) 7.h3 ("was the aim of whites move , but with Bh5 we can take advantage of our move order": 7...,Bh5 8.0-0 0-0-0 (?), but "!", Willemze, who says" we can follow up with e5 in one move". However, after 9.a4, black is in trouble, fot example c6 10.a5 Qc7 11.a6 with a clear edge (Stockfish 14 goes as far as claiming +1.6 which probably doesn't bode very well). If black plays 9.a4 e5 instead the eva; even goes up to +2,5, so you get the idea..black is on shaky ground