Land ho! Grandude and the Chillers are coming up for air this September in 'Grandude's Green Submarine'!

Beautifully illustrated by @KathrynDurst, and written by Paul, pre-order your copy here: https://t.co/34pBEwijqQ pic.twitter.com/wuTSb46Ml2

— Paul McCartney (@PaulMcCartney) March 18, 2021