A common question regarding the Jazz Jackrabbit games is where to obtain them. For the longest time, none of the games were commonly available, and the only way to get them was second-hand. As of 2017, both the first and second games of the series are available digitally.
Your best bet is probably to acquire the games via GOG, an online retailer. These are digital copies of the games, and include a few expansions as well. Use the links below for more information:
The games can occasionally be found in bargain bins or second-hand. You should probably check your local online second-hand platform first, but here are some sites that may sell the game: