Invasion from Below the Earth
Philip Curtis (Sharron Vintson cover), Tony Ross
Paperback
(Alfred A. Knopf, distributed by Random House., March 15, 1981)
At first Mr. Browser and his class are puzzled by strange holes in the ground. But when Selwyn finds them in his own backyard, he meets a Burrower, and advanced underground being. First published in London in 1980 by Andersen Press Ltd. as Mr. Browser Meets the Burrowers.. Text illlustrated by Tony Ross. ISBN is 394848950.