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Portrait of TJ Klune
Deep Dive · April 2025

TJ Klune

The House in the Cerulean Sea · Fantasy

The Marginalia
The House in the Cerulean Sea
TJ Klune
Cover of The House in the Cerulean Sea by TJ Klune

Book summary

A solitary caseworker is sent to assess a classified orphanage on a sunlit island. A club-favorite fantasy pick — our members spent a full month with The House in the Cerulean Sea, unpacking its structure, its heart, and the questions it leaves behind.

Comments · 9,307

U
Ulysses Hartley4/1/2026

I annotated so heavily the margins ran out. The pacing wobbles in the third quarter but the payoff earns it. Still thinking about that final line.

❤️ 318

N
Nina Quill3/30/2026

Perfect winter read. Or summer. Or any month, apparently. The dialogue is doing about four jobs at once. Solid four stars, and a full five for the ending.

❤️ 288

M
Miles Prewitt3/28/2026

I had to pause halfway through and just sit with it. Every scene has a door in it. Someone in chat pointed that out and I lost my mind. Five stars from me.

❤️ 318

S
Sadie Marsh3/27/2026

Our little side-thread on the middle section was the best part of the month. It's a quiet book with a very loud ending. Already lent my copy out twice.

❤️ 278

M
Marcus Merrick3/25/2026

This is the pick that made me rejoin the club, honestly. Every scene has a door in it. Someone in chat pointed that out and I lost my mind. Would happily do a re-read discussion next year.

❤️ 288

T
Thea Sinclair3/24/2026

Our little side-thread on the middle section was the best part of the month. Structurally it reminded me of last spring's pick, but warmer. Bumping the author's backlist to the top of my stack.

❤️ 318

A
Ada Fairweather3/22/2026

I annotated so heavily the margins ran out. The pacing wobbles in the third quarter but the payoff earns it. Thanks to everyone who posted here — made the read twice as good.

❤️ 11

T
Tamsin Ellery3/20/2026

Perfect winter read. Or summer. Or any month, apparently. Whoever flagged the recurring water imagery — thank you, I can't unsee it now. One of my favourites from the archive.

❤️ 288

U
Ulysses Merrick3/19/2026

This is the pick that made me rejoin the club, honestly. The secondary characters carry more weight than they get credit for. Still thinking about that final line.

❤️ 318

O
Opal Quill3/17/2026

Perfect winter read. Or summer. Or any month, apparently. The dialogue is doing about four jobs at once. Solid four stars, and a full five for the ending.

❤️ 11

H
Hazel Kingsley3/21/2026

Read it out loud to my partner in the evenings — highly recommend that way. It's a quiet book with a very loud ending. Bumping the author's backlist to the top of my stack.

❤️ 176

G
Grace Sterling3/20/2026

I had to pause halfway through and just sit with it. The prose does that trick where it's plain until suddenly it isn't. Would happily do a re-read discussion next year.

❤️ 226

V
Vera Vance3/18/2026

Read it out loud to my partner in the evenings — highly recommend that way. The dialogue is doing about four jobs at once. One of my favourites from the archive.

❤️ 226

T
Theo Ogden3/16/2026

I came in skeptical and left completely won over. The prose does that trick where it's plain until suddenly it isn't. Thanks to everyone who posted here — made the read twice as good.

❤️ 186

W
Wren Kingsley3/17/2026

Read it out loud to my partner in the evenings — highly recommend that way. It's a quiet book with a very loud ending. Solid four stars, and a full five for the ending.

❤️ 225

F
Felix Linden3/15/2026

I came in skeptical and left completely won over. The pacing wobbles in the third quarter but the payoff earns it. Still thinking about that final line.

❤️ 176

R
Rosalind Vance3/15/2026

Read it out loud to my partner in the evenings — highly recommend that way. The dialogue is doing about four jobs at once. Already lent my copy out twice.

❤️ 216

W
Wallace Ogden3/14/2026

I came in skeptical and left completely won over. The prose does that trick where it's plain until suddenly it isn't. Five stars from me.

❤️ 176

H
Hazel Sinclair3/11/2026

Our little side-thread on the middle section was the best part of the month. Structurally it reminded me of last spring's pick, but warmer. Bumping the author's backlist to the top of my stack.

❤️ 216

R
Rowan Sterling3/10/2026

I had to pause halfway through and just sit with it. The prose does that trick where it's plain until suddenly it isn't. Would happily do a re-read discussion next year.

❤️ 186