I really like this book, I bought it some time ago at a local shop and just love looking at the pictures as well as colouring them in! The book is a bit larger than the Millie Marotta and Johanna Basford books in height and width, but only a bit and is roughly the same thickness. The book is mainly a colouring book but also has a few pages of stickers at the back. Each of the colouring pages is thick but double sided. I use pencils and they work great, so I can't comment on how good pens are, but the pages are thick so it shouldn't cause too many problems as long as you are careful not to over-use the pens.
The pages in this book are different to many colouring books. Each image is a typical scene where you might find dogs, like in the park, in the kitchen, a living room, etc. Each page has parts already coloured in, for example, the floor and cabinets are already coloured in the kitchen, the bench, trees and grass in the park, etc. Each double page image actually looks like a photograph which has had one area, like the wall or the floor blanked out and replaced with a pattern for you to colour. The areas to colour in are big though, and there's plenty of creativity with so many different patterns and I like how intricate some of them are. Along with the detailed patterns there are less detailed ones too, so it's a real mix of things to colour in.
Once you've coloured in each double page you can then turn to the back of the book where there are a few pages of stickers. Each sticker is again photograph quality (rather than a cartoony image) and colourful and feature mainly dogs but also other items you can find in the rooms. The stickers are random. you can put any stickers into any scene you like (although saucepans might look weird on the street!), and I have to say I love creating unique images with these dog stickers added into the pictures.
This book is a real treat, there's so much fun in just colouring in the pictures but also the fun of the added stickers which I think more books should have! I'd definitely recommend this to any dog lover as well as anyone who just loves colouring and stickers! It's a bit of a different style of book, but I love it and I'm sure many others will too! :)