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Leman Russ and Thora Russ are often portrayed similarly to Magnus the Red and Ira the Flame, as ironic as it may seem to a keen student of history. However, novels about them are usually aimed at adolescent females, a fact that the Space Wolves and their Primarch seem to find both endlessly confusing and amusing at the sight time.
The first work describing their romance is the "The Wolf and the Flower" (1); an allegorical poem composed by Bragi of the Russ. While it follows the tradition of presenting women as connected to blossom, the flower representing Senshi Jupiter is of a particularly tough Fenrisian breed. It also comes to a stunning conclusion, which nevertheless is a fairly accurate description of this particular relationship. It loses some of its impact in translation, but it remains a rather interesting insight: "Ice will not threaten that which is united."
It is a pity that "The Wolf and the Flower" is not as well known as the famous "Taming of the Wolf" (2) by Lauryl Helm (3), as it might have improved the quality of most other books describing the couple. Like the previous examples it was written during the Great Crusade and had been quite popular until "The Siege of Olympia" had been published. The book itself had been quite polarizing, having accentuated the wolf-like nature of Russ to a much greater extent then it was perhaps suggested by his actions and behaviour in life.
While the depiction of Russ as animalistic and possessive is still common in literature, it has been slowly replaced by a depiction closer to that of Magnus the Red in "Crimson Passion". This can be credited to Janna Korenz and her "The Space Wolf's Saga" (4). Interestingly, it is a re-imaging of the "Taming of the Wolf", but given Korenz' greater insight and the ability to do research it is not surprising that she does a much better job of it then Helm did.
Unfortunately, the imitators of Korenz tend merely mimic the basic archetype, often exaggerating the qualities of both Senshi Jupiter and Primarch Russ, leading to them becoming the stereotypical fiery heroine and a wild, but good at heart man respectively.
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(1) A more in-depth analysis may be found in "Poetry of Fenris" by Brother Einarr the Odd of the Space Wolves.
(2) Those interested in learning more are advised to read Isabeth Monje's "Winter of the Heart", as the good madam Monje proves to be one of the few people capable of providing an impartial summary of the book and provides all the necessary context.
(3) Again, any accusations of the Space Wolves' involvement in Helm's early retirement are entirely baseless and the fact that she never appeared publically again, does not prove she has been killed.
(4) For further reading I suggest perusing Janna Korenz' "On Writing", where she describes the process that lead to her writing the book.
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