Dear Friends and Colleagues, We have a great pleasure inviting you to participate in this year's edition of the ACM SIGPLAN Workshop on Higher-Order Programming with Effects ( https://icfp18.sigplan.org/track/hope-2018-papers). The HOPE workshop series are intended to bring together researchers interested in the design, semantics, implementation, and verification of higher-order effectful programs. They are *informal*, consisting of invited talks, contributed talks on work in progress, and open-ended discussion sessions. They are dedicated to John Reynolds, whose work is an inspiration to us all. **Call for Presentations** We solicit proposals for contributed talks. We recommend preparing proposals of *at most 2 pages*, in PDF format. However, we will accept longer proposals or submissions to other conferences, under the understanding that PC members are only expected to read the first two pages of such longer submissions. When submitting talk proposals, authors should specify how long a talk the speaker wishes to give. By default, contributed talks will be 30 minutes long, but proposals for shorter or longer talks will also be considered. Speakers may also submit supplementary material (e.g., a full paper, talk slides) if they desire, which PC members are free (but not expected) to read. We are interested in talks on all topics related to the interaction of higher-order programming and computational effects. Talks about work in progress are particularly encouraged. If you have any questions about the relevance of a particular topic, please contact the PC chairs, Filip Sieczkowski (efes@cs.uni.wroc.pl) and François Pottier ( francois.pottier@inria.fr). ** Submission link ** https://icfp-hope18.hotcrp.com/ **Important Dates** * Deadline for talk proposals: June 8th, 2018 (Friday) * Notification of acceptance: July 8th, 2018 (Sunday) * Workshop: September 23, 2018 (Sunday) — Best regards, Filip Sieczkowski and François Pottier, PC co-chairs