I just purchased on ebay Henri van de Laar's Description of the Greek Individual Verbal Systems; publication year 2000; brand new hardcover. The price was reasonable for $39 (there are only two copies in stock on amazon and it retails for $81; none at abebooks). It's a linguistic text. According to the description, "the author attemtps to assemble the first description of the possible inflexions found for each verb that Greek inherited from PI-European up to the 5th century and in some cases later."
Is anyone familiar with the text and/or author?