Keiko Abe's contributions to the contemporary marimba repertoire have been a milestone in the development of the marimba as a solo concert instrument. Besides the creation of a new repertoire through commissions and her own compositions, Abe's contributions to the marimba include the improvement of the sound quality of the marimba and the establishment of the five octave instrument as the standard concert marimba. During the last four decades, Abe's compositions have been performed and studied worldwide and become standard literature for the marimba. Abe has written more than sixty compositions for marimba, including concertos, duets and solo pieces. The goal of this dissertation is to provide a comprehensive method for the performance and preparation of two major Keiko Abe's compositions, Marimba d'Amore composed by Abe in 1998 and Prism Rhapsody for Marimba and Orchestra composed in 1996. This dissertation will discuss theoretical as well as performance issues related to these two compositions. Each piece is discussed with regard to its distinctive compositional approach and inherent performances issues. In order to provide the reader an explanation of the compositional procedures used by Abe, specific directions for the performance and preparation of these two works are offered.