[Rant]
All the popular ebook readers lock you into a particular supplier and are able to do so because of DRM legislation.

In the UK, apparently it is unlawful to convert a protected file from one ebook format to another so you can't legally download a book in epub format and convert it to kindle. Crazy or what? but that means the publishers have you by the short and curlies. I also read that the regular publishers, like the record companies before them instead of seeing electronic publication as an opportunity are seeing it as a threat and are trying to create more restrictions via copyright legislation.

Dinosaurs or Canute? Take your pick.
[/Rant]

I don't see what the objections to Kindle are, except for jealousy of a successful business. The Kindle is a device designed for a specific task and it does that extremely well. It has its faults but many of these seem to be the faults with ebooks generally. I find it works very well for novels and the like but is less successful for reference books. I have bought just three reference books on Kindle and the main problem is being able to jump about the book, so I generally avoid them.

I have downloaded some C19 song books from Archive.org and they open fine in kindle but they indexing is poorly done so actually navigating to particular songs is a nightmare. When you get there, the songs are in continuous text form so they are not always clearly distinguished from one another. I understand that ebook formats are based on HTML so it should be possible to create usable song books.

I sent some of my song books to Amazon for conversion and they came back a mess, so I am sticking with PDF for now. I create my PDF files directly from Open Office and they work fine in Kindle. The thing you need to do is to use a fairly large font. At least 16pt and preferably 20pt. That way they are readable. I don't know why PDF's can't be magnified effectively in Kindle as my Android phone manages to do it no problems. Turning from portrait to landscape orientation as someone suggested earlier works quite well and will make 12pt quite readable at the cost of using two pages per page of the original.