Edward Phillips Oppenheim was born 22 October 1866 in Tottenham, London, the son of Henrietta Susannah Temperley Budd and Edward John Oppenheim, a leather merchant.
After attending Wyggeston Grammar School until the sixth form in 1883, his family's finances forced him to withdraw and he worked in his father's business for almost twenty years.
His father subsidized the publication of his first novel, which proved just successful enough to break even.
He published five of his novels between 1908 and 1912 under the pseudonym "Anthony Partridge".
Around 1900, Julien Stevens Ulman (1865–1920), a wealthy New York leather merchant who enjoyed Oppenheim's books, bought the leather works and made him a salaried director to support his writing career.
He quickly found a successful formula and established his reputation.
In 1913, John Buchan, launching his career as a suspense novelist, called Oppenheim "my master in fiction" and "the greatest Jewish writer since Isaiah".
As early as that year, his publishers were bringing out new editions of some of his earlier works to meet, in the words of one trade publication, "the insatiable demand of the public for more stories by him".
It added: "Readers of the author's recent books will find these first stories of life sketches full of interest, their very crudeness being positively amusing in light of his present finished craftsmanship."

In 1892 Oppenheim married an American, Elise Clara Hopkins of Easthampton, Massachusetts.
They lived in Evington, Leicestershire until the First World War and had one daughter.
During that war he worked for the Ministry of Information.

He described his method in 1922: "I create one more or less interesting personality, try to think of some dramatic situation in which he or she might be placed, and use that as the opening of a nebulous chain of events."
He never used an outline: "My characters would resent it."
When he needed villains for his diplomatic and political intrigues he drew on Prussian militarists and anarchists, enough for one reviewer to lament "the baldness of his propaganda".
For example, in A People's Man (1915), a socialist discovers that his movement is secretly run by German spies.

A 1927 review in the New York Times said he "numbers his admirers in the hundreds of thousands and has one or more of his books on a prominent shelf in almost every home one enters".
He appeared on the cover of Time magazine on 12 September 1927.

Reviews for his work treated them as entertainments with only a slight relationship to the mystery genre.
In 1933, a review of Crooks in the Sunshine explained that "Mr. Oppenheim's crooks are so polished that they have no difficulty in moving in the very best society.... There is very little mystery in this book, but there is dress-suit crime galore."
In 1936, a review of A Magnificent Hoax, his one hundredth novel, said: "The hoax is on the reader, who is led, through nearly 300 pages, only to find that nothing very terrible has happened.
The explanation takes a bit of believing, but since it extricates several very nice people from what looks like a nasty mess, one is willing to let that pass."
The Shy Plutocrat, published early in World War II, was "a good tale to take your mind off your worries".
Readers came to expect familiar themes, "the peculiar Oppenheim blend of dispatch-box atmosphere, femmes fatales, double traitors, and a tight plot".
In mid-career, The Great Impersonation (1920) was called "his best work".

Along with dozens of novel and short story collections, he produced an autobiography, The Pool of Memory in 1942.

Oppenheim's literary success enabled him to buy a villa on the French riviera and a yacht, then a house in Guernsey, though he lost access to this during the Second World War.
He regained the house, le Vanquiedor in St. Peter Port, after the war and died there on 3 February 1946.
His wife died there on 25 November.

An assessment that appeared in the New York Times upon his death said: "As he recalls in his pleasant and modest autobiography, all his books were easy to write.
They were equal
Edward Phillips Oppenheim was born 22 October 1866 in Tottenham, London, the son of Henrietta Susannah Temperley Budd and Edward John Oppenheim, a leather merchant. After attending Wyggeston Grammar School until the sixth form in 1883, his family's finances forced him to withdraw and he worked in his father's business for almost twenty years. His father subsidized the publication of his first novel, which proved just successful enough to break even. He published five of his novels between 1908 and 1912 under the pseudonym "Anthony Partridge". Around 1900, Julien Stevens Ulman (1865–1920), a wealthy New York leather merchant who enjoyed Oppenheim's books, bought the leather works and made him a salaried director to support his writing career. He quickly found a successful formula and established his reputation. In 1913, John Buchan, launching his career as a suspense novelist, called Oppenheim "my master in fiction" and "the greatest Jewish writer since Isaiah". As early as that year, his publishers were bringing out new editions of some of his earlier works to meet, in the words of one trade publication, "the insatiable demand of the public for more stories by him". It added: "Readers of the author's recent books will find these first stories of life sketches full of interest, their very crudeness being positively amusing in light of his present finished craftsmanship."
In 1892 Oppenheim married an American, Elise Clara Hopkins of Easthampton, Massachusetts. They lived in Evington, Leicestershire until the First World War and had one daughter. During that war he worked for the Ministry of Information.
He described his method in 1922: "I create one more or less interesting personality, try to think of some dramatic situation in which he or she might be placed, and use that as the opening of a nebulous chain of events." He never used an outline: "My characters would resent it." When he needed villains for his diplomatic and political intrigues he drew on Prussian militarists and anarchists, enough for one reviewer to lament "the baldness of his propaganda". For example, in A People's Man (1915), a socialist discovers that his movement is secretly run by German spies.
A 1927 review in the New York Times said he "numbers his admirers in the hundreds of thousands and has one or more of his books on a prominent shelf in almost every home one enters". He appeared on the cover of Time magazine on 12 September 1927.
Reviews for his work treated them as entertainments with only a slight relationship to the mystery genre. In 1933, a review of Crooks in the Sunshine explained that "Mr. Oppenheim's crooks are so polished that they have no difficulty in moving in the very best society.... There is very little mystery in this book, but there is dress-suit crime galore." In 1936, a review of A Magnificent Hoax, his one hundredth novel, said: "The hoax is on the reader, who is led, through nearly 300 pages, only to find that nothing very terrible has happened. The explanation takes a bit of believing, but since it extricates several very nice people from what looks like a nasty mess, one is willing to let that pass." The Shy Plutocrat, published early in World War II, was "a good tale to take your mind off your worries". Readers came to expect familiar themes, "the peculiar Oppenheim blend of dispatch-box atmosphere, femmes fatales, double traitors, and a tight plot". In mid-career, The Great Impersonation (1920) was called "his best work".
Along with dozens of novel and short story collections, he produced an autobiography, The Pool of Memory in 1942.
Oppenheim's literary success enabled him to buy a villa on the French riviera and a yacht, then a house in Guernsey, though he lost access to this during the Second World War. He regained the house, le Vanquiedor in St. Peter Port, after the war and died there on 3 February 1946. His wife died there on 25 November.
An assessment that appeared in the New York Times upon his death said: "As he recalls in his pleasant and modest autobiography, all his books were easy to write. They were equal
E. Phillips Oppenheim