Multifrequency observations of the classical CO nova V339 Del, detected in all frequencies from $\gamma$-rays to radio, are reviewed. Nova V339 Del was discovered on 2013 August 14.584 UT. The times of decline from the brightness maximum $V$ = 4.4 mag, reached on 2013 August 16.47, UT, was estimated as $t_{2,V}$ = 10 days, $t_{3,V}$ = 18 days, so V339 Del can be classified as a fast nova with super-Eddington luminosity at maximum. The maximum-magnitude-rate-of-decline relations were used to determine an absolute magnitude at maximum $M_{V,max} = -8.70\pm$ 0.03, $M_{B,max}$ = -8.45 ${\pm}$0.08 and distance $d$ = 3.2$\pm$0.3 kpc, using the interstellar extinction $E(B-V)$ = 0.184${\pm}$0.035. The distance to the nova found by different methods is in the range 2.7 - 4.54 kpc. The white dwarf mass was estimated from $M_{B,max}$ as $M_{wd}$ = 1.04$\pm$0.02 M$_{\odot}$. We suggest that the eruption occurred on the surface of a CO white dwarf. V339 Del is the first nova that has been observed to synthesize the element lithium. The dust consisted of amorphous carbon grains was detected in infrared region. The $UBVR_{C}I_{C}$ light curves of nova constructed from daily means of all available data, including our own observations obtained from its discovery till August 2015, are presented and used to show the track of the nova in the color-color diagram during the first 100 days. The dust particles formed in the dense clumps of ejecta were responsible for the $U$ light curve variability. Our medium-resolution spectrum of V339 Del taken in August 2015 by the 6m SAO telescope in North Caucasus confirms a non-spherical structure of the ejected shell.