The envelope

It comes addressed to your child, and no one else.

Real mail, addressed to your child by first name. Almost nothing else in the mailbox is theirs — this one is.
A field-post mark for where the letter came from — Deer Cave, in the limestone karst of Sarawak. Every place Dr. Finch works gets its own; across the series, the stamps trace her route around the world.
The letter

It's a story first, with the science folded inside.

A watercolor illustration in a naturalist's field-journal style — the part that pulls your child in before they've read a word.
The letter itself — an adventure in Dr. Finch's voice, with the science folded into the story. Written the way good middle-grade books are, not the way curriculum is.

Rendered small here on the screen. In your mailbox it arrives 8½ × 11, physical, in your child's hands instead of on a tab they'll close.

The specimen card

The specimen, written up like a field guide.

Dr. Finch's field notes, filled in by hand under a watercolor of the specimen. Twenty-four of these over the year — your child's own reference library of weird things.
A short glossary, a profile of the specimen, and one open question scientists still can't answer. Real science includes what we don't know.
The field mission

This is the part your child does, not just reads.

Where reading turns into doing. Two paired experiments your child runs with their own hands, framed as a request for help from Dr. Finch — not homework, fieldwork.
The explanation, delivered after your child has run the experiments. Experience first, then the why — because the science lands harder once they've felt the result themselves.
Subscribe

Two letters a month.

Everyone begins at Entry 1, no matter when you subscribe. Your first letter from Marlowe ships within a week of your order, addressed to your child by first name. After that, a letter is mailed on the 1st and the 15th of every month.

Monthly subscription

Two letters a month. Cancel anytime.
$14.99  / month
Billed monthly. US postage included.
  • Two letters per month
  • A specimen card and a field mission with every letter
  • Envelope addressed to your child by first name
  • Cancel anytime