If you create a webbook, what about the print, ebook, and bookapp formats? Remember repurposing is a way to get maximum revenue out of your book. Since many authoring programs today have an HTML core, conversion may be easier that you might think. This enables you to convert to other publishing formats with little extra work.
Programs that are capable of creating precise printing, such as Adobe InDesign, will typically import an HTML page. Consequently, not much is lost in regard to printing your book if you start with an HTML core.
The standard for print publishing is an Adobe Acrobat PDF. You send the PDF to the printer. In addition, you can use the PDF by itself as a book format, and distribute PDFs rather than ebooks or bookapps. PDFs have their own internal navigation and also integrate diverse media. (Note: InDesign exports a PDF as the final step for print publishing.)
Ebook
There are plenty of converters that take an HTML document or webbook and convert it into the EPUB format required for ebook publication. EPUB has an HTML core. The ebook platform has its own internal navigation capability, and you may want to remove any navigation code from your HTML pages prior to conversion.
Note also that HTML and EPUB are scheduled to merge and become one format sometime in the future.
Bookapp
HTML has become the core for developing not only digital documents but also software (applications, apps) for computer devices. What this means to you is that you can simply convert your webbook into an app that can be used by people on their smartphones or tablets. You make the conversion and submit the app to iTunes, Google Play, or other app stores (depositories, directories, catalogs), and you have made yourself an inexpensive bookapp for distribution into the app market.
There are many conversion programs available. Some are very expensive, and some are reasonably priced. The one I favor is an inexpensive app-building program named Monaca (https://monaca.io). You simply upload your website folders and files (in a ZIP file) to the online Monaca engine, and it creates either an Apple app or an Android app for you.
Monaca also has a close relationship with Osen, a app user interface that’s open software. Potentially a template made in the Osen software can provide convenient navigation capability comparable to a WordPress webbook or an ebook.
Osen Osen is much more complicated than just using HTML5 and CSS by themselves. You need to be a programmer to create a Osen template, but you don’t have to be a programmer to use such a template.
Although I find Monaca to be one of the easiest and least expensive converters, you should check out other software to see if there’s something that you like better.
If you simply convert your webbook to a bookapp with Monaca without using an Osen interface, the navigation that you place in your webpages is still necessary for navigation in the resulting app. Thus, it’s appropriate for any HTML navigation code to stay in your bookapp.
Using your core HTML webbook, you can easily convert it to another app authoring programs that use HTML for its core. There are a lot of them now, and there will be more in the future.
Read my book Publishing by Bookapp for precise details on how to create bookapps.
WordPress
Although WordPress has an HTML core, it uses database programming and PHP programming to create a CMS (content management system). Consequently, it is difficult to convert WordPress websites into other digital formats (e.g., a blog into an ebook). Nonetheless, there are services that do so. But they do a piecemeal job. They extract one webpage at a time from a WordPress website and incorporate it into an ebook or bookapp, a task you may be able to do easily and efficiently by yourself using copy & paste.
Other Software
Of course there are other systems using a different core that can export (convert) your book into HTML or EPUB. For instance, Adobe InDesign, not only produces a superb book for print, but will also export the pages into HTML or EPUB. Thus, if your primary objective is to print the book, you may find it convenient to write your book in InDesign rather than in a word processor.
But InDesign will also import an HTML document. Thus, if you start with HTML, you can still convert your writing into a print book.
I argue that writing a book in anything except HTML will require an substantial extra step somewhere along the line. The problem is that such an extra step can often be messy. That is, the webpages may require major adjustment after the conversion. Thus, an extra conversion step, no matter how automatic, is likely to be extra work and is therefore to be avoided if possible.
For example, writing in Word and then exporting the Word file as HTML will require some adjustments. Word is notorious for exporting messy HTML documents. It might be simpler and more efficient for you to write directly in an HTML authoring program such as Dreamweaver.
There is even some talk of HTML replacing PDF documents. This seems bound to happen, and is another reason why you might consider publishing a book in HTML as a starting point for publishing it in other formats. And Adobe Acrobat DC (the PDF authoring program, not the PDF reader) will convert an HTML webpage into a PDF.
Conversion tip An efficient way to convert is to copy & paste the WYSIWYG version of a chapter in one platform (software) into the WYSIWYG version of another platform. This is not trouble-free, but it often requires a minimum of tweaking.
Marketing
Publishing different versions of your book in different digital formats (different platforms) can be a marketing advantage. The promotion of each version of the book can be designed to promote the other versions of the book. For instance, in the back of your webbook version you can include a catalog for your other books. The ebook version of your webbook will be in the catalogs of the online bookstores (e.g., Amazon), thus giving visibility to your book (in all its versions) that you otherwise would not have with a webbook alone.
Final Word
As a practical matter, with HTML emerging as the core for most publishing software, it makes sense to choose HTML is your primary authoring tool. And as this book has indicated, HTML5 is a diverse media authoring system, which provides you with plenty of capability and flexibility.