FIRST PUBLISHED: February 1st, 2022. e-ISBN 978-967-25534-8-9 The history of the present handbook goes back to the first years of this century. During the early days of the BOR/MOL collection (Mollusca collection of Universiti Malaysia Sabah), material of land snails appeared difficult to identify. Literature on Sabah snails was generally scarce, scattered over mainly 19th century publications,and covered only a part of the species present in the material. To address this problem, the first author started a manuscript with a concise overview over the Sabah snail fauna, which would finally develop into this handbook. The first unpublished version started circulating among Sabah students of the snail fauna around 2002. It covered all snail families, but while some are shortly revised, others are no more than an uncritical list of species names. Unidentified species were listed with numbers (e.g. ‘Charopa sp. 2’), or with codes (‘Charopa sp. BO-02’), or with unpublished species names (‘Charopa infrastriata’, ...