This full-color， clinician-friendly manual is the authoritative guide to implementing the Joint Attention， Symbolic Play， Engagement， and Regulation （JASPER） intervention。 With a strong evidence base， JASPER provides a clear， flexible structure to bolster early skills core to social communication development。 The authors show how to assess 1- to 8-year-olds with autism spectrum disorder （ASD）， set treatment targets， choose engaging play materials， tailor JASPER strategies to each individual， and troubleshoot common challenges。 In a convenient large-size format， the manual features case examples， learning exercises， and reproducible clinical tools。 At the companion website， clinicians can download and print the reproducible materials as well as a supplemental annotated bibliography。