Notes. (i) = ALHAMBRA field name; (ii, iii) = central coordinates of the field; (iv) = area covered by each field; (v) = period between the beginning and the end of the observations in a given field; (vi) = name of the cosmological survey for which a particular ALHAMBRA field overlaps; (vii) = mean Galactic reddening along the line of sight derived by Schlegel et al. (1998) from the IRAS 100 μm data; (viii) = total number of spectroscopically identified QSOs in the field and those within our selection criteria; (ix) = source of the QSO classification and spectroscopic redshift: (1) = Schneider et al. (2010); (2) = DEEP webpage, Davis et al. (2003); (3) = Brusa et al. (2010); (4) = Veron-Cetty & Veron (2010); (5) = Barger et al. (2008); (6) = Willmer (priv. comm.); (7) = Rowan-Robinson et al. (2008);