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- Síla obsidiánu / Petra Martišková. V Praze : CooBoo, 2023 . 278 stran . ISBN 978-80-7661-725-4 [1, currently available 1, Access to Shelves 1]
- Kouzlo obsidiánu / Petra Martišková. V Praze : CooBoo, 2022 . 269 stran . ISBN 978-80-7661-403-1 [1, currently available 1, Access to Shelves 1]
- Tajemství obsidiánu / Petra Martišková. V Praze : CooBoo, 2021 . 284 stran . ISBN 978-80-7661-201-3 [2, currently available 2, Access to Shelves 1]