Book excerpt: Perfect Families: * Tick off museums in the guidebook* Tidy everything away neatly* Work hard and play fair* Show respect for one anotherReal Families: * Start fights in the Louvre * Keep all their worldly goods on the stairs and in the kitchen * Do their homework on the school bus and cheat at Monopoly* Tie the shoelaces of sleeping uncles together after Christmas dinnerWith her customary humour and reliably robust commonsense, Libby Purves celebrates family life in all its aspects. Her accounts of sibling rivalry and the pitfalls of family Christmas will provoke rueful laughter and strike chords of recognition; her practical tips on dealing with everything from marriage maintenance to money matters, testing times to trips and treats, provide essential help for the hard-pressed parent. Best of all is her reassuring reminder that no one else has a perfect family either!