Windows 10 Build 10074 ESD update files went live in Windows update servers few hours back. If you want to try out the latest build, you can download the ESD files directly from Microsoft and create an ISO using it. You can find download links to ESD files here.
Some enthusiasts have created an ISO using this ESD files. If you want to download them, fin the links below.
Download Windows 10 Build 10074 ISO from the below links,
CRC32: DDB78AB5MD5: 09AF483D74DDC71227D6D99DA617133CSHA1: 8777ADE253E43EA8C03AD84C9B8036F80CDCC2ED