Mystery mosaic color by number

A hidden picture on every page, revealed one square at a time.

One Square More publishes mosaic color-by-number activity books for adults, teens and families. No drawing skill, no decisions about colour — just a numbered grid, a pencil set, and the quiet satisfaction of watching a picture appear.

9Books available now
357Mosaic puzzles in print
8.5×11″Single-sided pages
Mystery Mosaic Color by Number: 100 Animals mystery mosaic coloring book coverMystery Mosaic Ocean mystery mosaic coloring book cover32 Halloween Mystery Mosaics mystery mosaic coloring book coverMystery Mosaic Safari mystery mosaic coloring book cover

How a mystery mosaic works

Three steps, no learning curve. If you can match a number to a colour, you can finish every page in the catalog.

1

Start with a grid

Each page opens as a plain grid of small numbered squares. There is no outline and no clue about the subject — that is the whole point.

2

Follow the colour key

A numbered key sits on every page. One equals sky blue, two equals ochre, and so on. You never have to decide which colour goes where.

3

Watch the picture surface

Somewhere around the halfway mark the image resolves — a lion, a lighthouse, a dragon. That moment is why people say “just one square more”.

Featured books

Nine paperbacks in print, from a 32-puzzle themed book to a 213-page collection of 100 animals.

See the full catalog →

Find the right book for you

Four ways into the catalog, depending on who you are buying for.

Color by number for adults

Denser grids and richer palettes, built for unwinding after work. Florals, wildlife and retro themes.

Animal mosaics

Big cats, pets, sea life and savanna wildlife — including our 100-puzzle flagship.

Holiday & seasonal

Halloween now, with gothic and winter themes on the way. Spooky in mood, family-safe in content.

Retro & 90s

The Black Edition line: arcades, robots and neon sunsets rendered as pixel-perfect mosaics.

Frequently asked questions

What is a mystery mosaic coloring book?

A mystery mosaic is a color-by-number puzzle printed as a grid of small numbered squares. There is no outline drawing to follow — you simply colour each square the colour its number tells you to, and a hidden picture gradually appears. It combines the calm of adult coloring with the pull of a puzzle.

Do I need special pencils or markers?

No. Every One Square More book is designed around an ordinary 12 to 24 colour pencil set. Gel pens and fine-tip markers work too, and because pages are printed single-sided, nothing bleeds through onto the next puzzle.

Are these books suitable for children?

Most are. Mystery Mosaic Fantasy, the Halloween Haunted Edition and 100 Animals are family-friendly and work well from roughly age 8 upward. Cozy Cats uses an easy-symbol key and is the gentlest starting point. The books labelled “for adults” are not unsuitable for children — they simply use denser grids.

Where can I buy One Square More books?

All titles are published as paperbacks through Amazon KDP and are available on Amazon in the US, UK, Canada, Australia and across Europe. Every book page on this site links straight to its Amazon listing.

What size are the books?

All titles are printed at 8.5 x 11 inches (21.6 x 27.9 cm) with single-sided pages, so squares stay large enough to fill comfortably and finished designs can be removed and framed.

Read the full FAQ →