We present a view of the high-energy sky between 20 keV and 2 MeV using INTEGRAL/SPI spectrometer public data available up to 2009. These data provide an all-sky survey of the high energy sources, reveal the Galactic Ridge emission, clue to its origin and give insights in the annihilation radiation processes. We detected up to ∼ 230 sources above 20 keV and achieve a high-energy source census with ∼ 70 sources detected above 100 keV. We show that the nonthermal component in hard X-ray from the

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... alactic Ridge can be explained by inverse-Compton interaction between cosmic-ray electrons and interstellar medium photons. We also study the 511 keV emission of both the bulge and disk and search for the recently suggested disk asymmetry, but our analysis shows that the disk emission is symmetric within the errors bars.