We are happy to announce the contents of ++ Volume 97 of the Information Systems Journal ++ Thu-Lan Dam, Sean Chester, Kjetil Norvag, Quang-Huy Duong Efficient top-k recently-frequent term querying over spatio-temporal textual streams Information Systems, Volume 97, 2021, 101687, ISSN 0306-4379 https://doi.org/10.1016/j.is.2020.101687 Edouard Fouche, Florian Kalinke, Klemens Boehm Efficient subspace search in data streams Information Systems, Volume 97, 2021, 101705, ISSN 0306-4379 https://doi.org/10.1016/j.is.2020.101705 Junhee Lee, Edman Anjos, Srinivasa Rao Satti SJSON: A succinct representation for JSON documents Information Systems, Volume 97, 2021, 101686, ISSN 0306-4379 https://doi.org/10.1016/j.is.2020.101686 Marcus Fischer, Adrian Hofmann, Florian Imgrund, Christian Janiesch, Axel Winkelmann On the composition of the long tail of business processes: Implications from a process mining study Information Systems, Volume 97, 2021, 101689, ISSN 0306-4379 https://doi.org/10.1016/j.is.2020.101689 Benjamin Fabian, Benedict Bender, Ben Hesseldieck, Johannes Haupt, Stefan Lessmann Enterprise-grade protection against e-mail tracking Information Systems, Volume 97, 2021, 101702, ISSN 0306-4379 https://doi.org/10.1016/j.is.2020.101702 Editors-in-Chief Dennis Shasha, Gottfried Vossen, Matthias Weidlich