He was self-taught, and reportedly studied Jewish theology, although there is no documentary evidence to support the notion.
In 1915, he edited and wrote ĂŽndrumarea magazine, which appeared for only a brief period; this marks his published debut.
His first book was the 1916 essay Menirea literaturii, in which he argued for a "message literature" and stressed the importance of ethics.
In 1916, he worked as a proofreader at Gazeta ilustrata.
In 1918, he was an editor for Scena and Presa libera; the same year, he held a similar role at Alexandru Macedonski's Literatorul.
In 1919, N.
D.
Cocea hired Peltz at Chemarea and Facla newspapers; at the same time, he was an editor at Adevarul and Diminea?a.
During the interwar period, he had an active newspaper career, also working as an editor at Epoca, Îndreptarea, Lupta, Era noua, Ordinea, Izbânda and Avântul, and as a contributor for the magazines Sburatorul (sporadically attending the publication's Eugen Lovinescu-led circle), Via?a Româneasca, România Literara, Cuvântul liber, Azi, ?antier, Bilete de Papagal, Vremea, Reporter and Adevarul literar ?i artistic.
He directed two magazines, Caiete lunare (1927) and Zodiac (1930-1932).
He sometimes used the pen names I.
P.
Aniurg, Enter, Ipel, Logicus, I.
Pajura and Rix.
After World War II and with the rise of the communist regime, Peltz was an editor at the newspapers Drapelul (December 1944 – 1946) and Era noua (1946-1948), and a contributor to România Libera (1957-1963), Steagul ro?u, Informa?ia Bucure?tiului, Munca, Gazeta literara, România Literara, Luceafarul, Veac nou, Albina, Flacara, Pentru Patrie and Revista cultului mozaic.
Arrested in 1949, he was sentenced to three years' imprisonment in 1950, passing through the prisons at Calea Rahovei, Jilava, Gherla and Aiud.His first book of literature, Fiori (1918), included prose poems.
For a time, he wrote plays (Veninul, 1917; Crima, 1920; Edi?ie speciala, 1921), which appeared in Revista pentru to?i.
His short prose includes Stafia ro?ie (1918), Me?terul via?a (1919), Paia?ele (1921) and Fanto?e vopsite (1924); Peltz returned to the genre under communism, with Inimi zbuciumate (1962), Pâna într-o zi (1963), Fauna burzului?ilor (1965), Instantanee comice – ?i nu prea...
(1967) and Microbar (1971).
His most noted works were his novels, beginning with Via?a cu haz ?i fara a numitului Stan (1929) and Horoscop (1932), but especially Calea Vacare?ti (1933) and Foc în Hanul cu tei (1934), which showed the full measure of his writing talent, later diluted and marked by aesthetic lapses in "Actele vorbe?te" (1935), ?ara buna (1936), Nop?ile domni?oarei Mili (1937) and Pui de lele (1937).
The World War II-era Ion Antonescu regime officially banned his entire work as "Jewish".
His postwar Israel însângerat (1946), Vadul fetelor (1949) and Max ?i lumea lui (1957) were unremarkable, but retained their setting within a Jewish milieu, which he barely updated to reflect current realities.
Authors he translated alone or in collaboration include George Sand, Henri Murger, Pierre Daix, Sarah Bernhardt (Memoirs), O.
Henry, Aziz Nesin, Konstantin Fedin, Ivan Yefremov, Arseniy Golovko, Mikhail M.
Nikitin, Pyotr Pavlenko and Alexander Rekemchuk.
He won the Romanian Writers' Society Prize in 1929 and the Romanian Writers' Union Special Prize in 1979.Peltz was a member of the Romanian Freemasonry.