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S.G. Hartnell

@sghartnell

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Pseudonym for Sunday Times bestselling author @bpwalterauthor. Gothic thriller MEDLOCK published by Sphere in 2025. Represented by @hardmanswainson.

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One of the joys of having two books out under two names in the same month is that they get to be ‘paperback table pals’ 😍📚 If you’re after a creepy read for Halloween, Medlock (by @sghartnell) is for you 🎃🍂 If you’re ready for some festive thrills, choose The Winter Visitor ❄️🎄 And if you like mysteries set in big houses/castles in general, you could even get both 😍🧡

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Seeing it on the tables in the shops always makes publication day feel more real! 😍📚 Such a lovely visit to @watchelmsford to sign their stock of both Medlock and The Christmas Guest! ✍️🎃🍂🎄❄️

#bookstagram #booksigning #medlock #thechristmasguest #waterstones

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It’s publication day!! 🎉😍 My gothic thriller MEDLOCK is now out in paperback! 💀🎃🍂 If you fancy a dark reimagining of The Secret Garden, with a touch of Rebecca and The Turn of the Screw, this is for you! 🧡📚 Thanks so much to the teams at @littlebrownbookgroup_uk and @hardmanswainson, my editor Cal Kenny and agent @swainson.literary.agent, for being so enthusiastic about this book and making the journey to publication a complete joy! And huge thanks to @paulahawkins2010, @louisecandlish, @johnboyneauthor, @janecorry, @louise_beech_swanson, @catherinecooperauthor, @carlyreagonauthor for such wonderful words on the cover, and to every author and reader who read the book in proof or hardback. 🥰 You can find this georgeous new paperback, designed by @benpriordesign, via the link in my bio 📚

#bookstagram #gothicthrillers #gothichorror #thesecretgarden #medlock

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One week to go until the paperback of MEDLOCK arrives! 🎃🍂 In fact, some early copies may already be creeping their way into shops as we speak 😍 So excited for my dark and twisted reimagining of The Secret Garden to find new readers this October!

#bookstagram #instabook #medlock #gothichorror #thesecretgarden

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Second-hand bookshop finds 😍📚 Wonderful to have these brilliant Tana French novels in their original hardback form (complete with retro Waterstones stickers on).

#tanafrench #bookstagram #dublinmurdersquad #dublinmurders #crimenovels

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Not only is today the first day of autumn, it also marks one month until the paperback of MEDLOCK - my gothic thriller reworking of The Secret Garden (written as @sghartnell) - arrives on shelves! 🍂🎃📚 The brilliant @benpriordesign and the team at @littlebrownbookgroup_uk have come up with a cover that’s both reminiscent of the hardback whilst introducing a haunting new vibe. Publishing 1 October 🎃📚 Available to pre-order from @waterstones via the link in my bio. (P.S. If you can’t wait until then, I’d be overjoyed if you grabbed the hardback - it’s still in bookshops! - or you can download on ebook and audio! 🎧)

#medlock #gothicfiction #gothichorror #bookstagram #thesecretgarden

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The paperback of my gothic thriller MEDLOCK (a reimagining of The Secret Garden, written under the name @sghartnell) publishes on 1 October, which of course means this gorgeous hardback edition will soon be retired. If you like to read/collect hardbacks and want to grab one before it vanishes, there should be limited copies still available in some shops/orderable via @waterstones online!

#gothicthriller #thesecretgarden #medlock #bookstagram #bookcollecting

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Really enjoying this. Fascinating subject, beautifully crafted. @poorsasquatch’s writing is amazing. Great to see it on the @thebookerprizes 2026 longlist today! 📚

#maywefeedtheking #bookerprize #bookerprize2026 #bookstagram #summerreading

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Three months until the paperback of my gothic thriller MEDLOCK (written as @sghartnell) hits the shelves! If you fancy a dark reimagining of THE SECRET GARDEN with a dash of REBECCA and touch of THE TURN OF THE SCREW, this is for you 💀🎃🍂 You can pre-order via the link in my bio!

#medlock #thesecretgarden #theturnofthescrew #bookstagram #gothicfiction

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I feel like I’m very late to this - everyone seems to have read it already! - but I’m thrilled to be finally getting to it. What a wonderful book.

#thenames #thenamesflorenceknapp #bookstagram #bookrecs📚 bookishinstagram

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Yesterday was my 34th birthday, and my lovely family got me gift cards to spend on books! 🎁🎉📚 So I spent a glorious couple of hours browsing in my local Waterstones and this is what I came back with 😄😍📚 Just like last year, I’m going to have a summer of amazing reading! (Some of these I had in proofs/other editions/have read already but I can never resist a finished copy/new cover 😂)

#bookstagramuk #bookshopping #waterstoneshaul #maggieofarrell #penguinclassics

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New paperback cover design for @sghartnell 's gothic thriller Medlock, coming out in October.

For the paperback cover I pushed the hardback imagery into more of an illustrative direction and reworked some parts completely. Really enjoyed reworking my design for the hardback and evolving it for the paperback cover.

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