I'm confused ...
The website definitely writes "Louis II. of Naples" ... who is this?
In 1352, there's a Louis I of Naples, who is titular king of Naples, but likely not really. ... He was 13 years in 1352 and lived somehow in "Anjou", I assume, likely somehow France today.
Is this Meliardus youth literature? Did Louis visit Naples? I think, there reigned then a Johanna.
Johanna's life tells ..
On the death in 1343 of her grandfather, Robert of Naples, his will provided that Andrew should be crowned King of Naples in his own right as well as Joan's, Robert having displaced Andrew's father, Charles Robert, from the Neapolitan throne. The 16-year-old Joan resisted this provision of the will with the support of the Neapolitan nobility, and the resulting turmoil resulted in the intervention of Pope Clement VI, as the feudal overlord of the Kingdom. He sent Cardinal Americ of St. Martin to annul Robert's will and take temporary control of the Kingdom of Naples. The Cardinal crowned Joan alone as Queen of Naples at Santa Chiara in Rome in August 1344. After the assassination of Andrew in 1345 (under her own orders), Joan married three more times: with Louis of Taranto, with James IV of Majorca and Prince of Achaea and with Otto, Duke of Brunswick-Grubenhagen.
Her one son by Andrew died at a young age, and her two daughters by Louis also died young.
Her reign was marked by violent political struggles among the members of the Angevin house. The assassination of Andrew brought about the enmity of King Louis I of Hungary and his invasion of Naples. Joan was forced for a period to flee to Avignon and to pay for her return to her kingdom by selling her rights over that city to Pope Clement VI; after several reverses of fortune, both Joan and Louis agreed to the papal request for a truce. The matter was to be solved by a new trial over Andrew's assassination, to be held in Avignon. Joan was acquitted of all charges, and she could return.
Her second husband, Louis of Taranto, was crowned as co-king in 1353 ...
There are two other persons named Louis, and one is mentioned in context to 1353, which is rather near to 1352, so something had happened then.
This is the life of Louis of Taranto:
Louis (1320 – 26 May 1362), of the House of Anjou, was the Prince of Taranto from 1346 and King of Naples from 1352. He was a son of Philip I of Taranto and Catherine II of Valois, Princess of Achaea. His paternal grandparents were Charles II of Naples and Maria of Hungary. His maternal grandparents were Charles of Valois and his second wife, Catherine I of Courtenay.
In 1342, Louis became Grand Master of the Order of the Holy Sepulchre, one of the oldest and most prestigious military orders of Christendom. In 1346, his elder brother Robert became the titular Latin Emperor. Louis was invested with Taranto.
On 20 August 1346, Louis married his cousin, the queen of Naples, Joan I, in Naples, becoming her second husband and the only of her husbands to be accorded the title of king. He was crowned King of Naples in 1352 (or perhaps 1353).
In 1360, as king, Louis invaded Sicily, in support of the insurrection against Frederick III the Simple. In 1361, Louis and Joan had to flee Naples for Gaeta to escape the armies of Louis I of Hungary. When Louis died, no husband of Joan was ever crowned king after him and Taranto passed to his younger brother Philip II.
Louis of Taranto, King of Naples, is missing at the other list, which linked above. He indeed reigned between 1352 - 1362, which correlates to the dates given by British library.
So there should be a dedication to a (living) Louis (of Taranto) in the book, which is responsible for the dating.
It's a little unclear, who is Louis I in this case. Louis I of Anjou (13 years in 1352) can't have been it, cause he became titular king in 1382. Maybe there was a further Louis in all this confusion about Johanna I, Louis the Great from Hungary, who for some time might have called himself also Louis, king of Naples, before he traded the arrangement with Johanna.
Louis of Hungary's later kingdom was considerable big ...