XMM-Newton spectra of the 14 high-λ_Edd quasars analysed in this paper. For each source, the top panel shows the X-ray spectrum (data from pn, MOS1, and MOS2 are indicated as black, red, and blue points, respectively) and the corresponding best-fit model (solid green line). The bottom panel shows the ratio between the data points and the best-fit model, except for J0809+46, whose spectrum is dominated by an absorption feature in the soft X-rays. To highlight the presence of this component, for this source the extension of the best fitting hard X-ray continuum power-law model to the soft X-ray portion is shown. Furthermore, for the quasar J1048+31, the inset figure displays the confidence contour plot of normalisation against rest-frame energy of the Gaussian line component that accounts for Fe Kα emission.