Catherine: One Love is Enough, first published in France as Il suffit d'un amour[1] is the first of a series of seven historical romance novels written by the best-selling author Juliette Benzoni between 1963 and 1978.

It focuses on the fictitious heroine Catherine Legoix, daughter of a goldsmith in Paris at the time of the Hundred Years' War and her seemingly hopeless love for the arrogant Arnaud de Montsalvy, Lord of the Châtaignerie in Auvergne and a captain in the service of King Charles VII.

It begins in 1413 in Paris and continues in Dijon at the court of Philip the Good, Duke of Burgundy, Bruges, Montsalvy, Auvergne, Orléans, Loire Valley, Burgos, Alhambra, and Luxembourg.

Catherine goes through many adventures; men fall desperately in love with her, her whole life is constantly in danger, and she is hunted down as a criminal and condemned to die more than once, until she finally becomes the beloved wife of Arnaud de Montsalvy, Lord of the Châtaignerie in Auvergne and a captain in the service of King Charles VII.

On 27 April 1413 during the Parisian riots, Catherine Legoix, 13-year-old daughter of a goldsmith living on the Pont-au-Change with her family, tries in vain to save a young knight, 16-year-old Armagnac Michel de Montsalvy, who has been condemned to be hanged for calling Duke John the Fearless, a traitor and spitting into his face.

They fall in love at first sight, but when the impulsive Arnaud learns that Catherine is related to the family who butchered his brother, he tells her that he only does not kill her because she is a woman.

The series continues with Catherine returning home and being beaten by her husband after spending a night at the palace, having been forced to stay by command of Duke Philip.

The Queen, who knows the truth about Arnaud de Montsalvy's cruel fate (had caught a disease which everyone assumes to be leprosy) wishes her to return into her service.

Queen Yolande receives her and writes a pardon for Arnaud, but asks that Catherine deliver a letter in secret to her son René d'Anjou who is a prisoner of Philip of Burgundy.

To Catherine's horror as the mercenaries are led by Arnaud de Montsalvy, her husband does not believe her and carrying with him the forged evidence of her supposed adultery, he tries to enter the castle and gets severely wounded by a crossbow.

With the help of Jean de Rémy, sent in disguise as a monk by Philip of Burgundy, Catherine, Béranger and Gauthier can finally take the road back to Montsalvy.

[7] After the release of Catherine in Great Britain, the American market published Benzoni's series in 1967 with enormous success using different book covers and different titles.

Readers had been left in the dark after the end of the sixth book (A Trap for Catherine) a fact which had been unknown to Benzoni, along with the abbreviation of translated titles until some years ago.

On 10 July 1964, Henri de Montfort, French historian, writer, and journalist, confirmed in Ici Paris: "This is a very enthralling novel of which one can say that it deserves the term "Romanesque" which is the best guarantee to keep a reader spellbound with pleasure and emotion during reading.

[citation needed] In 1967, the American book cover read: "Juliette Benzoni's Belle Catherine – A ravishing heroine in the full-blooded tradition of Désirée and Angélique, over 500,000 copies sold!

[19] On 8 February 2016, Vincent Meylan,[20] journalist, historian and author, wrote in his obituary about Juliette Benzoni: "The Queen is dead" — Catherine, the first heroine, the one with whom everything began half a century ago, is crying in her chamber in the Montsalvy donjon... and it does not matter if I know the end of all her books!

The Catherine books were adapted for television is produced by Antenne 2 (later France 2) from 19 March to 11 June 1986, consisting a total of 60 episodes and ran for 26 minutes under the direction of Marion Sarraut.

The script was written by Benzoni with Jean Chatenet, and it was the longest series on French television and the media said about it: "Catherine, that is Dallas at the time of Joan of Arc".

In December 2007, the French book sales club France Loisirs released the entire series on DVD with the complete collection consisting of five boxes in ten discs.