Hello there :) i've just moved Peruse to KDEReview. It is a comic book reader app and an accompanying creation tool, both based on Kirigami, and targeted both for desktops and mobile (hence the many email lists you may find this email on).
The current website is at https://peruse.kde.org/ and as you can see, there have in fact been releases made of this, though they are some time ago and based on Kirigami 1, which also has been causing some headaches for Neon, whose maintainers have been requesting that i get a new release out (which of course then requires that we actually sort out the current playground nature of the project). It should be noted that Peruse, when used as a generic viewer, uses the Okular qtquick components, which we discovered recently are not packaged by some distributions. It should be detected at runtime and Peruse ought to tell you as much. If you haven't got any comics to hand, do check out the store integration, where you might grab in particular Pepper & Carrot Volume 1, which also will show you some of the fancier features of the reader (such as frame-by-frame navigation, originally implemented by Wolthera). Look forward to seeing what people have to say about all this, and thank you to Wolthera and Carl who already made huge strides in improving the project over the years! -- ..dan / leinir.. http://leinir.dk/