~*.manga.*~

I believe Peach Girl was first published in English in monthly installments of Smile Magazine.
The first volume of Peach Girl by Miwa Ueda was published in America by Tokyopop in April of 2001. Peach Girl quickly became a fan favorite and won the prestigious Kodansha Manga Award in 1999.
Peach Girl is still in the process of publishing. (Peach Girl: Change of Heart volume 4 is scheduled to debut on September 16, 2003.)
The first part of the Peach Girl story arc - 8 volumes - are presented in the left-to-right 'westernized' format. The concluding 5 volumes are published in 100% Authentic Manga style (right-to-left) as Peach Girl: Change of Heart.
All of the volumes are sold for $9.99 and can be found in most book shops and comic shops.