I have bought quite a few, and it's annoying how many of the books claim to be low carb or Paleo and if they even give carb counts they often end up with recipes that are 24g per serving.
Also, many of the books are American which means deducting fibre from total carbs, whereas in the UK it's done for us. The whole cups thing too, rather than metric, is a pain, but some stores do sell US measurement cups (which differ from Aussie ones). The recipes often use species of fish that we just can't get here, as well.
I prefer to look for recipes online and put them on Pinterest or download Kindle editions of recipe books and copy anything I like the sound of, into a recipe notebook.
I've also been through my recipe books and cut out the low carb recipes from some, sticking them on A4 paper and putting in plastic pockets in a ringbinder. It cleared some shelf space, the paper went in the recycling and it means we've cooked more of the recipes because they are more accessible.
I have bought quite a few secondhand low carb and diabetic books recently and I'd recommend The South Beach Diet Cookbook by Dr Arthur Agatston MD and The Low Carb Cookbook by Fran McCullough. Both are American however.
Suggest having a look at Deliciously Ella by Ella Woodward because that's grain and dairy free, also Amelia Freer's book Eat. Nourish. Glow. She's done wonders with Sam Smith, Boy George and James Corden.