J. David Eisenberg 
Etudes for ClojureScript [PDF ebook] 

A short composition that provides practice material for a particular musical skill is called an tude. In this hands-on book, youll find more than 30 tudes to help you practice Clojure Script skills for specific programming areas, ranging from functions and variables to asynchronous processing. Each of these small projects includes a description of a program that you will compose (write) in Clojure Script.Though not as difficult as their musical counterparts, these programming tudes will help you stretch beyond the material and examples that you find in most Clojure Script books or online references. One chapter features tudes for an open-ended project that will help you put together what youve learned. Solutions to each tude are revealed in the appendix.Programming areas include:Working with functions and variables with def and let Interacting with Java Script and web pages, using several libraries Lists, vectors, and higher-order map, filter, and reduce functions Data mapping with Clojure Script Using different Clojure Script libraries to program with React Adding, subtracting, multiplying, and dividing rational and complex numbers with defprotocol and defrecord Asynchronous processing with core.async