Fireflies Twinbook


The night is deep and dark, with tiny bulbs fluttering in the fields.

$12.00 USD

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Mossery × Heikala

The Making of Fireflies

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New Twinbook Insert

Mossery Self-Care Journals

The two-in-one book.

One page to set your goals,
another to get you there.

A choice of planner and notebook.

Pick a combination that suits your lifestyle and workflow.

See design features

Refillable and interchangeable.

Switch it up, anytime. Easily replace used up inserts with new ones.

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Our medium books are designed to be durable and easy to carry around.

Threadbound hardcover
200H x 150W x 20D mm
Opens flat
Rounded corners
Ribbon bookmark
Front and back pockets


Write with ease across a smooth paper surface.

100 gsm
Bright white
ISO 9706 Long Life
ISO 14001 Environmental Management Standard
Made in Italy

Inside the box

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Customer Reviews

Based on 8 reviews
Kathryn Johnson
2nd Mossery Planner

I had one of these a few years ago. I decided to test out some other companies, but none lived up to the quality and flexibility of the twin book. I came back and will continue to give Mossery all of my money. Great products.


Repeating my order for 2nd year!


What a gorgeous notebook! I opted for the vertical undated planner with the dotted notebook, and it exceeded my expectations. It is truly gorgeous, and came in a nice paper case of sorts that I still use to protect it. The lettering is shiny, and the notebook cover is so soft. I can't explain how happy I am with this, one of my favorite possessions rn


Great! I love it!

Tayun Park
Beautiful feel and look

The art is printed as displayed and there is no difference in quality. The cover also has a velvety? feel to it and is very lovely to hold. The personalization is also beautifully printed! I requested the 'psyched' kaomoji to create a fun version of someone holding their own light for this cover. The cover feels durable and sturdy and I am enjoying using it! I only wish that the cover had at least two ribbons, but preferably three as I do use the light (half) notebooks.

I am using the dotted light refill as well as the 2021 horizontal half-year journal. I use muji pens, mildliners, and Staedtler dual tips. None of them bleed through the pages (and I have done some drawings and coloring with markers) but they do ghost a little. The ghosting is not so bad as to be distracting.