The Columbia Encyclopedia
by Paul Lagasse (Editor), Lora Goldman (Editor), Archie Hobson (Editor)

List Price: $125.00
Amazon Price: Click Here

Hardcover - 3200 pages 6th edition (June 2000)
Gale Research; ISBN: 0787650153 ; Dimensions (in inches): 3.79 x 14.90 x 9.92

Benet's Reader's Encyclopedia
by William Rose Benet (Editor), Bruce Murphy (Editor)

List Price: $50.00
Amazon Price: Click Here

Hardcover - 1144 pages 4th edition (September 1996)
Harpercollins; ISBN: 006270110X ; Dimensions (in inches): 2.00 x 9.66 x 7.77

The Cambridge Encyclopedia of the English Language
by David Crystal

List Price: $29.95
Amazon Price: Click Here

Paperback - 500 pages Reprint edition (October 1997)
Cambridge Univ Pr (Trd); ISBN: 0521596556 ; Dimensions (in inches): 1.22 x 10.89 x 8.66

Other:

Encyclopedia Brown : Boy Detective
by Donald J. Sobol, Leonard Shortall (Illustrator)

List Price: $4.50
Amazon Price: Click Here

Paperback - 111 pages Reissue edition (April 1, 1985)
Bantam Books (Mm); ISBN: 0553157248 ; Dimensions (in inches): 0.36 x 7.65 x 5.23

Obviously not an encyclopedia, but this has been a childhood favorite.