Volume 20

Volume 20 was released on July 18, 1998 in Japan.

Stadium Bomber Case
Anime Episode 130-131: The Indiscriminate Stadium Threatening Case

File 191 - The Eye From Far Away
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Magic Lovers Case
Anime Episode 132-134: Magic Lover's Murder Case

Sealed Bathroom Case
Anime Episode 121-122: The Locked Bathroom Murder Case

Blue Castle Case
Anime Episode 136-137: The Old Blue Castle Investigation Case

Trivia

 * The title for each chapter are worded as the following in Case Closed:
 * File 191 - An Eye in the Distance
 * File 193 - In a Snowy Meadow
 * File 194 - Suspicious Movement
 * File 195 - Investigation
 * File 196 - Discovery
 * File 197 - Sayonara
 * File 198 - Visible Evidence
 * File 199 - Sisterly Feelings
 * File 200 - Invitation to a Castle