A new product from 37signals in the Once lineup. Jason Fried with the announcement this week:

[it’s] surprisingly challenging to publish books on the web in nice, cohesive, tight, easy-to-navigate HTML format. A collection of 20 essays can be a book. Or a company’s handbook can be a book. Or an actual book like Shape Up can be a book.

But usually you have to make a custom web site, or stretch to use a blog publishing/CMS tool to kinda-sorta squish separate posts together into a packaged whole. It’s really not ideal. We know — we’ve published a variety of books online, and we’ve had to go the custom route each time.

So we did something about it. Introducing Writebook. It’s a dead simple platform to publish web-based books. They have covers, they can have title pages, they can have picture pages, and they can have text pages. Each book gets its own URL, and navigating and keeping track of your progress is all built right in.

It’s available now to download and play with. Super cool idea, and a gift to the web from the 37s team to make this available for free.

There’s also a really cool list of classic books available as a showcase of what the platform can do.