The next one is a technical review article, which is already more demanding: H. Purwins, B. Li, T. Virtanen, J. Schlüter, S. -Y. Chang, and T. Sainath, "Deep Learning for Audio Signal Processing," IEEE Journal of Selected Topics in Signal Processing, vol. 13, no. 2, pp. 206-219, May 2019. (Also available in arXiv)
Here's an entire online textbook about deep learning written by top researchers. However, notice that this book is from the year 2016, so the newest tricks are missing: I. Goodfellow et al., Deep Learning, MIT Press, 2016.