The Field Notes Snowblind edition really deserves to be unwrapped and used outdoors. The white cover changes to blue when the book is bathed in the UV light of direct sunlight. I have never seen this effect. Placed on my windowsill behind double glazing and still wrapped in cellophane, even in the British midsummer the photochemistry has no chance of happening.
Update: We had some sunny weather so I removed the cellophane. The white covers that had been sealed inside turned blue immediately. It looks like the top cover had been deactivated (and slightly yellowed) by continual exposure.
The notebook on the right is a Silvine Memo Book (99p). Its front cover is the same colour as the ladybird on the left, but the back is “sunned” as they say in the book trade, with the faint pink shadow of a 50p coin.
The last element here is the Retro 51 Dr. Gray Tornado Rollerball pen which is luminous. It does write very smoothly and actually leaves the same line as a vintage Sheaffer fountain pen I bought recently. There are still some Dr. Grays available at the PenShed at the time of writing. The skeleton image is beautifully printed with a lacquer finish. Henry Gray wrote the book on human anatomy: ‘Anatomy’, published in 1858. Well, yes, there are other books on the subject.
Any exercise book or notebook will do the job, but you can still buy 
I did a lot more than class work with my rough books. Diaries were tiny in the 1970s and could record little of your life unless you could write as small as 
Once, before a holiday with school chums in Paris, I 
I hope you get the idea: it’s for a long-form diary or journal, thoughts, early versions, anything on your mind that you want to get down and stop thinking about, or anything you want to record before you forget it, from shopping lists to ideas for blog posts, articles or recipes. You can be as discursive/tangential as you like and often new ideas come this way. Capsule reviews of film or TV — you’ll thank yourself twenty years later! Doodles, sketches. The neighbours’ doings. Stuff that won’t get captured by these new-fangled devices we carry these days, or any thoughts you don’t want to be read by the NSA or GCHQ. If you do keep a diary, then a rough first version at the time can allow you to write a concise account later and be certain whether you shampooed the dog on Tuesday or Wednesday.
As I said in my last blog post, I’m writing this in response to Myke Hurley on the 
Pensive 