Things are looking up for seven-year-old Bertie Pollock. The arrival of his spirited grandmother and the absence of his meddlesome mother—who is currently running a book club in a Bedouin harem (don't ask)—bring unforeseen blessings: no psychotherapy, no Italian lessons, and no yoga classes. Meanwhile, this tenth book in the series brings all manner of surprises to Scotland Street's grown-ups, from a family secret to a pesky guest at a soirée.