The matching skirt can be found here:
Tweedy Skirt

Description from the book:
If you truly want to look sharp, as your mother would no doubt say you should - even if you didn’t ask for her opinion - there’s nothing for it but to wear a suit. Wearing this casual set knit in classic tweed, you’ll be happy and so will your mother.

The jacket is simply a V-neck cardigan with shaping at the waist. The border is picked up all around the edge after the main piece is finished. The little A-line skirt is shaped at front and back with darts, and includes a knitted on waistband facing and hook-and-eye closures. Make your mom proud.