ERIC by DORIS LUND 345 pages. Lippincott. $7.95.
It should be recordednot in the spirit of sneering at misfortunethat books about slow expiration from leukemia have become something of a literary genre. In his best novel, Blood of the Lamb, Peter DeVries wrote obliquely about his daughter's leukemia. Stewart Alsop collected nerve and wits long enough during a remission to write Stay of Execution about his own plight before he died. Football Player Brian Piccolo's death became first a fond memoir by his friend Gale Sayers, then a TV film called Brian's Song. Now Freelance Writer Doris Lund offers Eric, a book...