So this is automatic reading, thought Martin,"" who has volunteered to test inventor J. J. Jay's wordless Electric Book. Once inside the machine Martin experiences disconcerting scene shifts and time jumps and then the author keeps changing the story from baseball to sharks at sea to detectives. . . and every now and then Martin seems to be switched from his role as Reader to one of Character. Meanwhile the Writer has stolen his belt with the turn-off switch, his only way of ending the book and getting out. . . and are the three kid characters on Martin's side or the Writer's? And how can Martin make himself get bored, thus escaping the Writer's power, when his adversary keeps writing surprises into the script? Impossible, with Hall as Writer; he's sure to stay one step ahead of all those Readers who rush through the sort of light adventure story he toys with here. . . and who can't help being turned on by The Electric Book.