I’m so startled, my pen jerks off my notebook and, to my horror, makes a blue line, straight across a photograph of perfectly cooked basmati rice. Quickly I shift my hand, almost covering up the mark, and turn round innocently. A man in a white shirt and a name badge is looking at me disapprovingly.

“This isn’t a public library, you know,” he says.

“I’m just browsing,” I say hurriedly, and make to close the book. But the man’s finger comes out of nowhere and lands on the page before I can get it shut. Slowly he opens the book out again and we both stare at my blue Biro line.

“Browsing is one thing,” says the man sternly. “Defacing shop stock is another.”

“It was an accident!” I say. “You startled me!”

“Hmm,” says the man, and gives me a hard stare. “Were you actually intending to buy this book? Or any book?”

There’s a pause — then, rather shamefacedly, I say, “No.”

“I see,” says the man, tightening his lips. “Well, I’m afraid this matter will have to go to the manager. Obviously, we can’t sell this book now, so it’s our loss. If you could come with me and explain to her exactly what you were doing when the defacement occurred. .”

Is he serious? Isn’t he just going to tell me kindly that it doesn’t matter and would I like a loyalty card? My heart starts to thud in panic. What am I going to do? Obviously, I can’t buy the book, under my new frugal regime. But I don’t want to go and see the manager, either.

“Lynn?” the man’s calling to an assistant at the pen counter. “Could you page Glenys for me, please?”

He really is serious. He’s looking all pleased with himself, as though he’s caught a shoplifter. Can they prosecute you for making Biro marks in books? Maybe it counts as vandalism. I’ll have a criminal record. I won’t ever be able to go to America.

“Look, I’ll buy it, okay?” I say breathlessly. “I’ll buy the bloody book.” I wrench it from the man’s grasp and hurry off to the checkout before he can say anything else.

Standing at the next checkout is the old woman in the blue coat, and she calls triumphantly, “I took your advice! I’ve got her one of those traveling books. I think she’ll really like it!”

“Oh good,” I reply, handing my recipe book over to be scanned.

“It’s called The Rough Guide to India,” says the old woman, showing me the fat blue paperback. “Have you heard of it?”

“Oh,” I say. “Well, yes, but—”

“That’s £24.99, please,” says the girl at my till.

What? I look at the girl in dismay. Twenty-five quid, just for recipes? Why couldn’t I have picked up some cheap paperback? Damn. Damn. Very reluctantly, I take out my credit card and hand it over. Shopping is one thing, being forced into purchases against your will is something else. I mean, I could have bought some nice underwear with that twenty-five quid.

On the other hand, I think as I walk away, that’s quite a lot of new points on my Club Card. The equivalent to. . fifty pence! And now I’ll be able to make loads of delicious, exotic curries and save all that wasted takeaway money. Really, I’ve got to think of this book as an investment.

I don’t want to boast, but apart from that one purchase, I do incredibly well over the next couple of days. The only things I buy are a really nice chrome flask to take coffee into the office. (And some coffee beans and an electric grinder.) And some flowers and champagne for Suze’s birthday.

But I’m allowed to get those, because, as David E. Barton says, you must treasure your friends. He says the simple act of breaking bread with friends is one of the oldest, most essential parts of human life. “Do not stop giving your friends gifts,” he says. “They need not be extravagant — use your creativity and try making them yourself.”

So I’ve bought Suze a half bottle of champagne instead of a whole one — and instead of buying expensive croissants from the patisserie, I’m going to make them out of that special dough you get in tubes.

In the evening we’re going out to Terrazza for supper with Suze’s cousins Fenella and Tarquin — and, to be honest, it might be quite an expensive evening. But that’s OK, because it counts as breaking bread with friends. (Except the bread at Terrazza is sun-dried tomato focaccia and costs £4.50 a basket.)

Fenella and Tarquin arrive at six o’clock, and as soon as she sees them, Suze starts squealing with excitement. I stay in my bedroom and finish my makeup, putting off the moment of having to go out and say hello. I’m not that keen on Fenella and Tarquin. In fact, to be honest with you, I think they’re a bit weird. For a start, they look weird. They’re both very skinny, but in a pale, bony way, and have the same slightly protruding teeth. Fenella does make a bit of an effort with clothes and makeup, and doesn’t look too bad. But Tarquin, frankly, looks just like a stoat. Or a weasel. Some bony little creature, anyway. They do strange things, too. They ride around on a tandem and wear matching jumpers knitted by their old nanny and have this family language which no one else can understand. Like they call sandwiches “witchies.” And a drink is a “titchy” (except if it’s water, which is “Ho”). Take it from me, it gets irritating after a while.