Professor Bullfinch and Doctor Grimes take Danny and his friends to the beginning of the Nile River in Africa to investigate local legends of a swamp monster. Despite unforeseen calamities, a new, rare species of electric catfish is discovered..
Paperback, 1983 reissue, illustrated by Paul Sagsoorian
References
^Fiction, folklore, fantasy & poetry for children, 1876-1985. R.R. Bowker Company. 1986. p. 1635.
^R. Reginald, Douglas Menville, Mary A. Burgess · (2010). Science Fiction and Fantasy Literature, Volume 1. Wildside Press, LLC. p. 4. ISBN9780941028752.{{cite book}}: CS1 maint: multiple names: authors list (link)
^Joyce Nakamura, Laurie Collier, ed. (1993). Major Authors and Illustrators for Children and Young Adults: A Selection of Sketches from Something about the Author, Volume 6. Gale Research. p. 2485.