Thanks to many works amongst which is a regional novel 'Prosjaci i sinovi', Ivan Raos can certainly be called one of the most famous and most diverse authors of Croatian post-war literature. The novel testifies to life of three generations – Kikaš's, Matan's (Matan the First) and Matan the Second's and represents the synthesis of Raos' creativity. Oral literature, fictional and factual events became the basis of Raos' novel. Throughout the novel, Raos proved to be an excellent acquaintance of Croatian history and historical tales. The historical tale about king Zvonimir and his marsupial Godislav is the cause of beggarly job of Raos' characters in the novel. Among many brigands cited in the novel, the most prominent are Mijat Tomić, Roša Harambaša and Andrijica Šimić who was betrayed by his godfather Ante Garac. While mythic and demonological tales and supernatural creatures take a special place in Imotski area, the fairies take the important significance. A personal experience with demonic, otherworldly creatures is the basis of any demonological tale. By writing a novel 'Prosjaci i sinovi', which is a hybrid of oral and written literature, Ivan Raos contributed to the preservation of Croatian oral literature, Croatian spirituality and intangible cultural heritage.