An Interview with Isabell Castro and Sam Pinansky from BookWalker

Date: 2026 August 09 11:02

Posted by Joe

BookWalker is a digitalbook store and app that offers officially licensed manga, light novels, manhwa and audio books. It has recently relaunched as Bookwalker.com, spinning off from Bookwalker.jp. One of the key changes is the inclusion of Lightweight Content Protection (LCP) DRM. They've added this to the platform to allow you to buy and keep your books.

We had a little interview with Isabell Castro, BookWalker Senior Marketing Manager and Sam Pinansky, BookWalker's CEO to ask them more about what's happening over at BookWalker.

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Why has BookWalker opted to add LCP (Lightweight Content Protection) to its platform?


Isabell Castro, BookWalker Senior Marketing Manager

Isabell: Honestly, we really wanted to break down the "walled garden" that has frustrated digital readers for years. Historically, buying digital manga or light novels meant people were trapped reading them strictly inside a single proprietary app.

We chose Readium LCP DRM because it strikes a genuinely fair balance. It fulfills our legal obligations to publishers to protect creator rights, but more importantly, it honors our readers' freedom. By downloading actual .lcpl or EPUB files, readers get true digital portability. If they bought the book, they should be able to read it on their own terms. It is as simple as that.


What platforms can users read LCP DRM content on? (e.g., Kindle, other eInk readers and tablets, etc.)

Isabell: Since LCP is a wide-open industry standard, our readers are absolutely not locked into our official app anymore.

Of course, they can still use our newly overhauled web viewer and mobile apps (which we rebuilt from scratch to be much faster) but they can also open their files in any app that natively supports Readium LCP. We aren't affiliated with any third-party providers, but a few popular options our readers enjoy are Thorium Reader (which is fantastic for PC/Mac), FBReader, Aldiko, or PocketBook. It also works beautifully on open eInk devices like Android-based Onyx Boox or Meebook readers.


What can you share about the data and trends among users?

Isabell: Looking back at our data from the last nine years showed us that the metadata, genres, and tags sent to us by various publishers had turned into a bit of a mess. Our users were getting frustrated trying to find things, and we heard them loud and clear.

That's why we wiped our old data libraries entirely and rebuilt our tagging and filtering system from the ground up in partnership with the community-based cataloging site MangaBaka.

Tagging is a never-ending endeavor that can always be improved, and we're deeply dedicated to making series as easy to find as possible.

Additionally, our data clearly shows that Western manga and light novel fans don't treat digital media as disposable. Our readers are building lifetime collections. That insight is exactly why we pivoted our entire technical architecture toward offline capabilities, file portability, and highly requested sorting features.


What sorts of titles can readers read on the platform?

Isabell: We are currently hosting a massive, ever-expanding global catalog of over 79,000+ volumes. Readers will find 100% official releases of manga, light novels, manhwa, webtoons, and audiobooks from all the major publishers, alongside our continued support for Original English Light Novels.

With this new platform split, our storefront functions strictly as a dedicated, optimized English-language hub to better serve the international community. It allows us to focus entirely on making the experience great for English-speaking readers.


Your books are safe following the split with the Japanese BookWalker - What is the rationale behind that?

Isabell: First and foremost, we want to reassure everyone that our readers' books are 100% safe. We know a platform split can sound scary, but here is the honest rationale behind why we did it.

Forcing two completely different user bases (domestic Japanese readers and international fans) onto a single, unified backend was really slowing us down. The two markets have entirely different UI expectations, payment preferences, and storefront needs. By splitting into the English Collection (bookwalker.com) and the Japanese Collection (bookwalker.jp), our global team can now build features exclusively for our readers without worrying about breaking the Japanese domestic platform.

Past Japanese purchases haven't gone anywhere; they are safely available in the Japan Store. To access them, all readers have to do is log into the BookWalker Japan web viewer or the legacy Japanese app using their existing login details.


Sam Pinansky, BookWalker's CEO

Looking at Sam's bio, please share some details on what it was like doing the translation and subtitle timings for The Tatami Galaxy, as that anime has some notoriously fast-paced dialogue.

Sam: Ah yes, my masterpiece, my albatross. Back at that time I was often working closely with Fuji Television to provide subtitles for their noitaminA block, and The Tatami Galaxy was no different, or so I thought until I got something I'd never received before, a script with dialog so dense I thought it couldn't be real.

As was usual for the time, I got a finalized script about a week early, but the final video for the show only 2-3 days before broadcast, and it was a marathon each week to translate and time this show's immense dialog and speed.

It became immediately obvious that this was no normal show, and although I did buy the original novel to reference, the show was its own beast and I was left with a really hard question: Do I faithfully translate the dialog in its entirety, or do I attempt to paraphrase to leave the subtitles in an actually readable state? I am an extremely fast reader, but technical limitations required that lines max out at 2 per subtitle, and the pace of the main character's speech meant that one subtitle would disappear too quickly for the average individual to read fast enough. Ultimately, I decided to keep everything there, without cuts for "viewability". And yes, it was an issue. People were having to pause just to read everything, or rewind constantly... It was a show where dubbing might have been a superior choice (Spoiler: It was never dubbed). Thankfully the pacing did mellow out a bit after the first 2-3 episodes (or perhaps, the audience began to adapt to the necessary reading speed), and the show itself is a true masterpiece, so I think people have fond memories of it now.

But man, was it a struggle to work on for simulcast. Thankfully I was given an opportunity later on for the DVD/bluray release to give the translation a brush up (along with adding in the OVA specials).

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You can buy manga, light novels, manhwa and audio books from BookWalker.com.

We'd like to thank Isabell Castro and Sam Pinansky for being available for interview over e-mail and giving such awesome answers to our questions.

Source: BookWalker