I wholeheartedly second the book suggestions offered by Magnus. These three offer a readable approach to the topic of MM without the MEGO (Mine Eyes Glazeth Over) effect of "Moonlight...".
Thrangu Rinpoche gave a legendary series of five ten-day retreats at Big Bear, CA between 1990-95, where he gave extensive commentaries on "Moonlight of Mahamudra". The book was chosen at the request of the translator for the first year's retreat, Ken McLeod, and Rinpoche himself remarked not once but several times during the next few years that the book was actually intended for instructors of MM rather than audiences of laypeople. I attended these retreats and was already somewhat familiar with the book, but the sheer amount of material covered was sometimes overwhelming. Be that as it may, since you already have the big book you'll find that the three books recommended by Magnus are excellent, even necessary, companion volumes.
"All the sublime teachings, so profound--to throw away one and then grab yet another will not bear even a single fruit. Persevere, therefore, in simply one."
--Dudjom Rinpoche, "Nectar for the Hearts of Fortunate Disciples. Song No. 8"