in which ereader will be supported for epub3?

Nobody knows.

The Adobe Reader Pocketbook uses in his most recent firmware version is said - according to Forkosigan - to support Epub3.

Please ask questions in the correct forum. I'm moving this to the ePub forum.

The Adobe Reader Pocketbook uses in his most recent firmware version is said - according to Forkosigan - to support Epub3.

That just doesn't sound correct. If Adobe had come out with an ePub 3 compatible ADE, we'd have known about it before this post.

The latest ADE preview incorporates some ePub 3 features, such as support for vertical writing systems, but it's certainly not fully ePub3-compliant.

That just doesn't sound correct. If Adobe had come out with an ePub 3 compatible ADE, we'd have known about it before this post.

I share your doubts. I've taken my "wisdom" from this post in the German subforum:

http://www.mobileread.com/forums/showpost.php?p=1888514&postcount=367

It is about the latest final firmware 2.1.2. The translation of one of the bold lines goes something like this:

A new version of Adobe Reader has been ported, that even supports EPUB 3.

Adobe has not announced any public plans for support of ePub 3. The next version of ADE (1.8 or 2.0 depending upon what they decide) does not contain support for ePub 3.

The current version of RMSDK (9.3.1) does not contain support for ePub 3 (but does have have support for Ruby and other things needed to properly render CJK documents).

Unfortunately now that I am no longer working for Adobe, I'm even more constrained about talking about their future plans ( there are some ).

I share your doubts. I've taken my "wisdom" from this post in the German subforum:

http://www.mobileread.com/forums/showpost.php?p=1888514&postcount=367

It is about the latest final firmware 2.1.2. The translation of one of the bold lines goes something like this:

A new version of Adobe Reader has been ported, that even supports EPUB 3.

Adobe has not announced any public plans for support of ePub 3. The next version of ADE (1.8 or 2.0 depending upon what they decide) does not contain support for ePub 3.

The current version of RMSDK (9.3.1) does not contain support for ePub 3 (but does have have support for Ruby and other things needed to properly render CJK documents).

Well, given what was just posted (and quoted here), Pocketbook is very wrong and I hope the truth comes out so people don't buy one thinking it does support ePub 3 when clearly it does not.

If you check the epub 3 wiki page you will see what support there is for this standard. If you find more please update the page.