Ethan Shanfeld Buck Meek, the Texas-born singer-songwriter and guitarist of Big Thief, has signed to 4AD and announced his third solo album, “Haunted Mountain,” slated for an Aug. 25 release. Meek teased the upcoming release with a music video for the lead single, also titled “Haunted Mountain,” which is co-written by Jolie Holland. The album, according to the announcement, is about love and “something bigger than love, something that doesn’t challenge love exactly but stands in contrast to it. A soulfulness, or a soul-seeking fullness.” In Meek’s own words, “Not break-up songs, but an actual love song written in earnest? That is taboo now. Sometimes it can feel like all the great love songs have already been written.”