Andy blake's comet coaster

Andy was an industrious young entrepreneur who grew increasingly rich from book to book, working as he did in advertising, in his airplane, the Comet Coaster, and looking for gold and helping erect profitable buildings. Blake meets new friends, three young men struggling to save an old carriage business from going to the wall. Will advertising help? Andy is enthusiastically hopeful. The later trickery of a junior employer puts the young advertising man in a bad hole. Things seem darker than ever for the tottering business. Then comes the idea of dropping carriages for coaster wagons.