Simply Happy is a collection of nice pieces for solo accordion written by composer and accordionist Markéta Laštovičková. The book contains eight solo pieces of varying difficulty and technical levels for standard and melodic bass and a simplified version of Simply Happy for accordion trio, originally written for the chamber group Check Accordion Trio. The solo pieces are divided into 2 halves, where the first part is dedicated to younger children, so the pieces are also accompanied by pictures for children to colour in, and for the more inquisitive there is also a musical crossword in the book. The second part is aimed at students of the second level of the ZUŠ or lower years of conservatories.