In connection to the publication of @Orodruin's new textbook Mathematical Methods for Physics and Engineering, CRC Press has graciously offered Physics Forums three free copies of it to use as prizes in various competitions of which this will be the second. Note! The book is aimed towards advanced undergraduate and graduate students in physics and the prerequisites for understanding the contents are therefore rather high. If for this or any other reason you feel that you do not want the book, you are still welcome to participate in the contest. Note (2)! Due to shipping costs, we can offer free shipping within the United States only. If you want to compete for the book from another country, be aware that shipping costs may have to be imposed. Contest closes Jan 5th. Post with most likes wins. Haiku rules -There are only three lines, totaling 17 syllables. -The first line is 5 syllables. -The second line is 7 syllables. -The third line is 5 syllables like the first. -Punctuation and capitalization are up to the poet, and need not follow rigid rules used in structuring sentences. -A haiku does not have to rhyme, in fact usually it does not rhyme at all. -Some haiku can include the repetition of words or sounds Limerick rules Limericks are short poems of five lines having rhyme structure AABBA. It is officially described as a form of 'anapestic trimeter'. The 'anapest' is a foot of poetic verse consisting of three syllables, the third longer (or accentuated to a greater degree) than the first two: da-da-DA. The word 'anapest' shows it's own metric: anaPEST. Lines 1, 2 and 5 of a limerick should ideally consist of three anapests each, concluding with an identical or similar phoneme to create the rhyme. Lines 3 and 4 are shorter, constructed of two anapests each and again rhyming with each other with the overall rhyme structure of AABBA.