Yeah, that was one. 'Ranier' should be 'Rainier'. The Coupe Rainier was run only once - although there were plans to revive it in both 1938 and 1939 - and the Monaco GP of course pre-dates it by seven years.
Bira's full name was Prince Birabongse Bhanudej Bhanubandh. The name assigned to him by Mr Reynolds - Prince Bhanurangsi Savangwongse - is that of his father, who was a Field Marshal in the Siamese army.
Who's Yul Brenner? Could he be related to that bald actor bloke? At least in passing?
Not sure about the 'Eton long jump' either! Bira was about five foot nothing - hardly the build for a long jumper.
Pat Fairfield was not succeeded by Bira in the ERA works team. After Pat was killed his place was taken by Arthur Dobson, who wasn't retained for 1938 and whose seat went to Earl Howe. Bira never drove for any works team apart from Gordini.
Bira did not win 16 Grands Prix before WW2. He won 16 races for 1500cc cars, some of which had 'Grand Prix' in their names. His only race in a pre-1946 Grand Prix, in a car which conformed to the then-current International Formula, was the Cork Grand Prix in 1938. He finished second.
Turning to the Amazon blurb - Bira's cars were not painted blue and yellow until 1939. Before that they were the distinctive 'Bira blue', as until the end of 1938 - when Siam was elected a member of the AIACR - he raced using a British licence. Apart from the flag of the Royal Thai Air Force, the blue/yellow combination has no particular significance. Red is the most significant colour for Thai royalty. Bira was - of course - assigned Thai racing licence number 1!
I have a feeling Olympic historians might also be somewhat confused by the suggestion he had taken part in Olympic sports other than yachting. He was an accomplished glider pilot - not an Olympic sport though. He was also an excellent sculptor - he designed and made the memorial to Fairfield which now (once more) resides at Donington Park and his bust of Field Marshal Smuts was selected for the Royal Academy Summer Exhibition in 1943.
Apart from that, it's entirely accurate!