De ferhalen yn Grypstra syn debútbondel 'Heftich' litte sjen dat it libben fan middelbere skoaljeugd behoarlik heftich wêze kin. De ûnderwerpen rinne fan drank- en drugsgebrûk oant digipesten en misbrûk troch in loverboy. Mar der wurdt ek omtinken jûn oan luchtiger saken sa as fakânsjeperikelen en in ekskurzje nei it bûtenlân. 'Heftich' is in flotskreaun boek dat midden yn dizze tiid stiet.
Ate Grypstra studied English, Frisian and German. He works as a language teacher and loves spending time with his family. Furthermore, he enjoys reading, writing, playing the guitar, tenor banjo and mandolin, playing board games and playing computer games.
Ate worked as a scriptwriter for the following computer games: 1. Cross of the Dutchman (PC) 2. Truck Driver (XboX, PS4, Switch, PC)
He is the author of the following (Frisian) books: 1. (2008) Heftich 2. (2010) Rinze hat de Hik 3. (2010) Tsjang Tsjin Tiid 4. (2010) De Aventoeren fan Jurre B. Grim Diel I (webbook) 5. (2011) It Beest fan de Westereen 6. (2012) Krús fan de Hollanner 7. (2013) Tsjang en de Taaldief 8. (2013) Rinze is Gek op Wetter (app) (www.rinzedekikkert.nl) 9. (2013) Rinze syn Jierdei (app) 10.(2013) Rinze's AaBee (app) 11.(2014) as deldwarreljende jiske 12.(2014) Femke Faalt 13.(2016) Rinze op Reis (app)