Boxed set ISBN: 9780008387754
The Hobbit ISBN: 9780008376055
The Fellowship of the Ring ISBN: 9780008376062
The Two Towers ISBN: 9780008376079
The Return of the King ISBN: 9780008376086
- the original editions were the same height as 'typical' Tolkien hardbacks. These reissues are a bit shorter.
- the original editions were clothbound, the reissues are not.
- the reissues are cheaper than a standard Tolkien hardback (by approx $5-$10)
The text setting is the exact same as the paperbacks above. These are nicer than paperbacks (due to the hardback format) however, while nicer and more extravagant hardbacks, these are very budget-friendly. They are a bit cheaper than a typical, non-Tolkien hardback, and a bit more than a paperback. So, that makes these great 'starter editions' or gifts. Of course, if you like the look of them, they can also be extra copies. But don't expect too much from them. Worthy of note: their height dimensions are shorter than that of a 'usual' Tolkien hardback.
The Hobbit ISBN: 9780007487301
The Fellowship of the Ring ISBN: 9780008567125
The Two Towers ISBN: 9780008567132
The Return of the King ISBN: 9780008567149
[no boxed set]
Next, we have the illustrated by the author trinity. All three primary titles are now out, and it's very unlikely that other titles will be released into this style. Of course, never say never, but it's unlikely. These are offered in both standard hardback and deluxe slipcased formats.
The Hobbit ISBN: 9780008627782
The Lord of the Rings ISBN: 9780008471286
The Silmarillion ISBN: 9780008537890
Lastly, there's the illustrated hardbacks. It's personal choice if one prefers these, or the illustrated by the author editions in instances where the same title exists in both styles. This style has more titles that match, so that is worth mentioning.
....and of course, special mention goes to the Alan Lee 1-book edition of The Lord of the Rings from 2014. (ISBN: 9780007525546) While it 100% doesn't match other Tolkien books, it can be seen as - despite some minor aesthetic and size differences - a 1-book alternative to the above editions of The Lord of the Rings. It's a nice enough edition considering the price tag.