The latest I have read is Star Wars: the Visual Encyclopedia (2017) This is a newer version of what is now a series of books (mostly labeled visual Dictionary). It appears to be complete as of its publication date, and as such has material from the third season of Rebels and from Rogue One. Content (other than the pictures) is rather slight, and many of the pictures are very small as there are so many per page. For instance, I have wanted to see the frieze from Chancellor Palpatine's office in detail for a while, but in this book it was only about 1 inch by 4 inches high! Even with high resolution printing, that did not help much.
An interesting part of the book for me is how much material comes from the two cartoons, and further how very good it looks in the book. It makes me suspect that the Clone Wars tv show in particular is actually much higher visual quality than it appears on TV, making me wonder about DVD or other ways of watching it where the sharpness of the images come through.
A few useful pictures (which are probably worth viewing full size)
|Various alphabets from the SW universe|
|Blasters (long gun)|