Throughout, author and cloud expert Gavin Pretor-Pinney catalogs a variety of clouds and gives readers points for spotting them and recording their finds.

"An official publication of the Cloud Appreciation Society." Originally published: United Kingdom : Sceptre, 2009. Includes indexes.

Ten main cloud types. Cumulus ; Stratocumulus ; Stratus ; Altocumulus ; Altostratus ; Cirrus ; Cirrocumulus ; Cirrostratus ; Nimbostratus ; Cumulonimbus -- Notable species & varieties. Lenticularis ; Fibratus ; Castellanus ; Undulatus ; Lacunosus ; Radiatus ; Duplicatus -- Accessory clouds & supplementary features. Pileus ; Velum ; Pannus ; Mamma ; Virga ; Arcus ; Tuba ; Incus -- Other clouds. Cap & banner ; Kelvin-Helmholtz ; Contrails ; Pyrocumulus ; Roll cloud ; Fallstreak hole ; Horseshoe vortex ; Fog & mist ; Diamond dust ; Nacreous ; Noctilucent -- Cloud optical effects. Iridescence ; Corona ; Crepuscular rays ; Glory ; Rainbow ; Cloudbow & fogbow ; 22ê halo ; Sundog ; Circumzenithal arc ; Sun pillars -- Technical terms -- Cloud classification.