Hi Nola - writing in multiple first person is indeed tricky, and having the name of the character as a header and/or each character with a clear voice is paramount. I well remember the pain of reading Allegiant - and for ever having to flip back a page or two to see which pov I was in. And recently at book club, one person hated all but the last 100 pages of All That I Was because she hadn't twigged that the sections were labelled with the pov character, so constantly got lost, while I enjoyed it (only getting lost once). I enjoyed Picout's Storyteller - must read her Sister's Keeper.
I think you make a great point about not leaving it to end of a letter to alert the reader as to it's from.
Personally, I prefer writing multiple POV in deep 3rd as there is less chance of reader confusion :)
Hi Jenny - I think you're right about it being easier to write multiple POVs in third-person. Will be looking at third-person POV in a couple of weeks' time. I'm currently reading 'Legend' by Marie Lu and really enjoying that. It's easy to keep track of because of the headers and different fonts, but the voices do sound quite similar at times. I ended up spending much more time on this blog than I'd intended because I was finding it hard to come up with examples that actually worked well with different voices. Definitely not a POV for the faint-hearted, but can work well in the right hands :)