This issue includes many new exciting discoveries as well as the manual for PERIOD04 – the latest incarnation of our multiple-period-finding software package. Contents Preview: • New variable and multiple stars in the lower part of the Cepheid instability strip • OV And, a new field RRab Blazhko star? • Search for intrinsic variable stars in three open clusters: NGC 1664, NGC 6811 and NGC 7209 • High-degree non-radial modes in the δ Scuti star AV Ceti • Projected rotational velocities of some δ Scuti and γ Doradus stars • Application of the Butterworth’s filter for excluding low frequency trends • PODEX - PhOtometric Data EXtractor • Period04 User Guide.

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